315413534521 has 4 divisors (see below), whose sum is σ = 318204804852. Its totient is φ = 312622264192.

The previous prime is 315413534497. The next prime is 315413534621. The reversal of 315413534521 is 125435314513.

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 2300545296 + 313112989225 = 47964^2 + 559565^2 .

It is a cyclic number.

It is not a de Polignac number, because 315413534521 - 2²⁵ = 315379980089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315413534021) 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, 1395634996 + ... + 1395635221.

It is an arithmetic number, because the mean of its divisors is an integer number (79551201213).

Almost surely, 2^315413534521 is an apocalyptic number.

It is an amenable number.

315413534521 is a deficient number, since it is larger than the sum of its proper divisors (2791270331).

315413534521 is a wasteful number, since it uses less digits than its factorization.

315413534521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791270330.

The product of its digits is 108000, while the sum is 37.

The spelling of 315413534521 in words is "three hundred fifteen billion, four hundred thirteen million, five hundred thirty-four thousand, five hundred twenty-one".