340118521 has 4 divisors (see below), whose sum is σ = 340685044. Its totient is φ = 339552000.

The previous prime is 340118501. The next prime is 340118531. The reversal of 340118521 is 125811043.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196981225 + 143137296 = 14035^2 + 11964^2 .

It is a cyclic number.

It is not a de Polignac number, because 340118521 - 2²³ = 331729913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340118501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282360 + ... + 283561.

It is an arithmetic number, because the mean of its divisors is an integer number (85171261).

Almost surely, 2^340118521 is an apocalyptic number.

It is an amenable number.

340118521 is a deficient number, since it is larger than the sum of its proper divisors (566523).

340118521 is an equidigital number, since it uses as much as digits as its factorization.

340118521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566522.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 340118521 is about 18442.3024864034. The cubic root of 340118521 is about 698.0342953787.

Adding to 340118521 its reverse (125811043), we get a palindrome (465929564).

The spelling of 340118521 in words is "three hundred forty million, one hundred eighteen thousand, five hundred twenty-one".