100312631 has 4 divisors (see below), whose sum is σ = 106213392. Its totient is φ = 94411872.

The previous prime is 100312613. The next prime is 100312643. The reversal of 100312631 is 136213001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136213001 = 271 ⋅502631.

It is a cyclic number.

It is not a de Polignac number, because 100312631 - 2²⁶ = 33203767 is a prime.

It is a super-2 number, since 2×100312631² = 20125247876284322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 5900743 = 100312631 / (1 + 0 + 0 + 3 + 1 + 2 + 6 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100372631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2950355 + ... + 2950388.

It is an arithmetic number, because the mean of its divisors is an integer number (26553348).

Almost surely, 2^100312631 is an apocalyptic number.

100312631 is a deficient number, since it is larger than the sum of its proper divisors (5900761).

100312631 is an equidigital number, since it uses as much as digits as its factorization.

100312631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5900760.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 100312631 is about 10015.6193517925. The cubic root of 100312631 is about 464.6420816875.

Adding to 100312631 its reverse (136213001), we get a palindrome (236525632).

The spelling of 100312631 in words is "one hundred million, three hundred twelve thousand, six hundred thirty-one".