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340521221 = 463735467
BaseRepresentation
bin10100010010111…
…111000100000101
3212201202021022002
4110102333010011
51144133134341
653442315045
711303245145
oct2422770405
9781667262
10340521221
111652406a7
1296058a85
1355717961
1433320925
151ed6529b
hex144bf105

340521221 has 4 divisors (see below), whose sum is σ = 341257152. Its totient is φ = 339785292.

The previous prime is 340521217. The next prime is 340521239. The reversal of 340521221 is 122125043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122125043 = 1031118453.

It is a cyclic number.

It is not a de Polignac number, because 340521221 - 22 = 340521217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340521193 and 340521202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340521241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367271 + ... + 368196.

It is an arithmetic number, because the mean of its divisors is an integer number (85314288).

Almost surely, 2340521221 is an apocalyptic number.

It is an amenable number.

340521221 is a deficient number, since it is larger than the sum of its proper divisors (735931).

340521221 is an equidigital number, since it uses as much as digits as its factorization.

340521221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735930.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 340521221 is about 18453.2170907948. The cubic root of 340521221 is about 698.3096773669.

Adding to 340521221 its reverse (122125043), we get a palindrome (462646264).

The spelling of 340521221 in words is "three hundred forty million, five hundred twenty-one thousand, two hundred twenty-one".

Divisors: 1 463 735467 340521221