100131131 has 4 divisors (see below), whose sum is σ = 100307064. Its totient is φ = 99955200.

The previous prime is 100131127. The next prime is 100131149. The reversal of 100131131 is 131131001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100131131 - 2² = 100131127 is a prime.

It is a super-2 number, since 2×100131131² = 20052486790678322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100131181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87110 + ... + 88251.

It is an arithmetic number, because the mean of its divisors is an integer number (25076766).

Almost surely, 2^100131131 is an apocalyptic number.

100131131 is a deficient number, since it is larger than the sum of its proper divisors (175933).

100131131 is an equidigital number, since it uses as much as digits as its factorization.

100131131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175932.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 100131131 is about 10006.5544019907. The cubic root of 100131131 is about 464.3616801391.

Adding to 100131131 its reverse (131131001), we get a palindrome (231262132).

The spelling of 100131131 in words is "one hundred million, one hundred thirty-one thousand, one hundred thirty-one".