340475521 has 4 divisors (see below), whose sum is σ = 348779844. Its totient is φ = 332171200.

The previous prime is 340475503. The next prime is 340475549. The reversal of 340475521 is 125574043.

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 48441600 + 292033921 = 6960^2 + 17089^2 .

It is a cyclic number.

It is not a de Polignac number, because 340475521 - 2⁷ = 340475393 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340475501) 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, 4152100 + ... + 4152181.

It is an arithmetic number, because the mean of its divisors is an integer number (87194961).

Almost surely, 2^340475521 is an apocalyptic number.

It is an amenable number.

340475521 is a deficient number, since it is larger than the sum of its proper divisors (8304323).

340475521 is an equidigital number, since it uses as much as digits as its factorization.

340475521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8304322.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 340475521 is about 18451.9787827756. The cubic root of 340475521 is about 698.2784368469.

The spelling of 340475521 in words is "three hundred forty million, four hundred seventy-five thousand, five hundred twenty-one".