345513521 has 4 divisors (see below), whose sum is σ = 360535872. Its totient is φ = 330491172.

The previous prime is 345513517. The next prime is 345513523. The reversal of 345513521 is 125315543.

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.

It is a cyclic number.

It is not a de Polignac number, because 345513521 - 2² = 345513517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345513523) 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, 7511141 + ... + 7511186.

It is an arithmetic number, because the mean of its divisors is an integer number (90133968).

Almost surely, 2^345513521 is an apocalyptic number.

It is an amenable number.

345513521 is a deficient number, since it is larger than the sum of its proper divisors (15022351).

345513521 is a wasteful number, since it uses less digits than its factorization.

345513521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15022350.

The product of its digits is 9000, while the sum is 29.

The square root of 345513521 is about 18587.9940015054. The cubic root of 345513521 is about 701.7057184617.

The spelling of 345513521 in words is "three hundred forty-five million, five hundred thirteen thousand, five hundred twenty-one".