315512123562251 has 16 divisors (see below), whose sum is σ = 393388560660480. Its totient is φ = 245839355138880.

The previous prime is 315512123562247. The next prime is 315512123562253. The reversal of 315512123562251 is 152265321215513.

It is a cyclic number.

It is not a de Polignac number, because 315512123562251 - 2² = 315512123562247 is a prime.

It is a super-2 number, since 2×315512123562251² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (315512123562253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117392891 + ... + 120050468.

It is an arithmetic number, because the mean of its divisors is an integer number (24586785041280).

Almost surely, 2^{315512123562251} is an apocalyptic number.

315512123562251 is a deficient number, since it is larger than the sum of its proper divisors (77876437098229).

315512123562251 is a wasteful number, since it uses less digits than its factorization.

315512123562251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237460634.

The product of its digits is 540000, while the sum is 44.

Adding to 315512123562251 its reverse (152265321215513), we get a palindrome (467777444777764).

The spelling of 315512123562251 in words is "three hundred fifteen trillion, five hundred twelve billion, one hundred twenty-three million, five hundred sixty-two thousand, two hundred fifty-one".