315521213025 has 12 divisors (see below), whose sum is σ = 521661738992. Its totient is φ = 168277980240.

The previous prime is 315521213011. The next prime is 315521213071. The reversal of 315521213025 is 520312125513.

It is not a de Polignac number, because 315521213025 - 2¹² = 315521208929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 315521212983 and 315521213001.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2103474679 + ... + 2103474828.

Almost surely, 2^315521213025 is an apocalyptic number.

It is an amenable number.

315521213025 is a deficient number, since it is larger than the sum of its proper divisors (206140525967).

315521213025 is a wasteful number, since it uses less digits than its factorization.

315521213025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4206949520 (or 4206949515 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 315521213025 its reverse (520312125513), we get a palindrome (835833338538).

The spelling of 315521213025 in words is "three hundred fifteen billion, five hundred twenty-one million, two hundred thirteen thousand, twenty-five".