515323315356231 has 16 divisors (see below), whose sum is σ = 696268963766880. Its totient is φ = 338986490179200.

The previous prime is 515323315356203. The next prime is 515323315356307. The reversal of 515323315356231 is 132653513323515.

It is a happy number.

It is not a de Polignac number, because 515323315356231 - 2²² = 515323311161927 is a prime.

It is a super-2 number, since 2×515323315356231² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515323315356331) 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, 2902192816 + ... + 2902370373.

It is an arithmetic number, because the mean of its divisors is an integer number (43516810235430).

Almost surely, 2^{515323315356231} is an apocalyptic number.

515323315356231 is a deficient number, since it is larger than the sum of its proper divisors (180945648410649).

515323315356231 is a wasteful number, since it uses less digits than its factorization.

515323315356231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5804563586.

The product of its digits is 3645000, while the sum is 48.

Adding to 515323315356231 its reverse (132653513323515), we get a palindrome (647976828679746).

The spelling of 515323315356231 in words is "five hundred fifteen trillion, three hundred twenty-three billion, three hundred fifteen million, three hundred fifty-six thousand, two hundred thirty-one".