115213031 has 2 divisors, whose sum is σ = 115213032. Its totient is φ = 115213030.

The previous prime is 115213009. The next prime is 115213051. The reversal of 115213031 is 130312511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115213031 - 2²² = 111018727 is a prime.

It is a super-2 number, since 2×115213031² = 26548085024413922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115213001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57606515 + 57606516.

It is an arithmetic number, because the mean of its divisors is an integer number (57606516).

Almost surely, 2^115213031 is an apocalyptic number.

115213031 is a deficient number, since it is larger than the sum of its proper divisors (1).

115213031 is an equidigital number, since it uses as much as digits as its factorization.

115213031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 115213031 is about 10733.7333207044. The cubic root of 115213031 is about 486.5945055223.

Adding to 115213031 its reverse (130312511), we get a palindrome (245525542).

The spelling of 115213031 in words is "one hundred fifteen million, two hundred thirteen thousand, thirty-one".