340551521 has 4 divisors (see below), whose sum is σ = 340609044. Its totient is φ = 340494000.

The previous prime is 340551517. The next prime is 340551527. The reversal of 340551521 is 125155043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125155043 = 13 ⋅9627311.

It can be written as a sum of positive squares in 2 ways, for example, as 261145600 + 79405921 = 16160^2 + 8911^2 .

It is a cyclic number.

It is not a de Polignac number, because 340551521 - 2² = 340551517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340551527) 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, 18710 + ... + 32111.

It is an arithmetic number, because the mean of its divisors is an integer number (85152261).

Almost surely, 2^340551521 is an apocalyptic number.

It is an amenable number.

340551521 is a deficient number, since it is larger than the sum of its proper divisors (57523).

340551521 is an equidigital number, since it uses as much as digits as its factorization.

340551521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57522.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 340551521 is about 18454.0380675884. The cubic root of 340551521 is about 698.3303889059.

The spelling of 340551521 in words is "three hundred forty million, five hundred fifty-one thousand, five hundred twenty-one".