104131531 has 8 divisors (see below), whose sum is σ = 119119104. Its totient is φ = 89171880.

The previous prime is 104131523. The next prime is 104131541. The reversal of 104131531 is 135131401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 104131531 - 2³ = 104131523 is a prime.

It is a super-2 number, since 2×104131531² = 21686751496807922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 104131499 and 104131508.

It is not an unprimeable number, because it can be changed into a prime (104131501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1746 + ... + 14536.

It is an arithmetic number, because the mean of its divisors is an integer number (14889888).

Almost surely, 2^104131531 is an apocalyptic number.

104131531 is a deficient number, since it is larger than the sum of its proper divisors (14987573).

104131531 is a wasteful number, since it uses less digits than its factorization.

104131531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13961.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 104131531 is about 10204.4858273212. The cubic root of 104131531 is about 470.4651062062.

Adding to 104131531 its reverse (135131401), we get a palindrome (239262932).

The spelling of 104131531 in words is "one hundred four million, one hundred thirty-one thousand, five hundred thirty-one".