515230131 has 24 divisors (see below), whose sum is σ = 754126896. Its totient is φ = 312698880.

The previous prime is 515230129. The next prime is 515230151. The reversal of 515230131 is 131032515.

It is not a de Polignac number, because 515230131 - 2¹ = 515230129 is a prime.

It is a super-2 number, since 2×515230131² = 530924175780554322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 515230098 and 515230107.

It is not an unprimeable number, because it can be changed into a prime (515230151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30051 + ... + 43971.

It is an arithmetic number, because the mean of its divisors is an integer number (31421954).

Almost surely, 2^515230131 is an apocalyptic number.

515230131 is a deficient number, since it is larger than the sum of its proper divisors (238896765).

515230131 is a wasteful number, since it uses less digits than its factorization.

515230131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14023 (or 14010 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 515230131 is about 22698.6812612539. The cubic root of 515230131 is about 801.6788343255.

Adding to 515230131 its reverse (131032515), we get a palindrome (646262646).

The spelling of 515230131 in words is "five hundred fifteen million, two hundred thirty thousand, one hundred thirty-one".