104215531 has 16 divisors (see below), whose sum is σ = 126086400. Its totient is φ = 84234528.

The previous prime is 104215483. The next prime is 104215549. The reversal of 104215531 is 135512401.

It is a happy number.

It is not a de Polignac number, because 104215531 - 2¹⁷ = 104084459 is a prime.

It is a super-2 number, since 2×104215531² = 21721753803223922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104215031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2760 + ... + 14698.

It is an arithmetic number, because the mean of its divisors is an integer number (7880400).

Almost surely, 2^104215531 is an apocalyptic number.

104215531 is a deficient number, since it is larger than the sum of its proper divisors (21870869).

104215531 is a wasteful number, since it uses less digits than its factorization.

104215531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12018.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 104215531 is about 10208.6008345904. The cubic root of 104215531 is about 470.5915758963.

Adding to 104215531 its reverse (135512401), we get a palindrome (239727932).

The spelling of 104215531 in words is "one hundred four million, two hundred fifteen thousand, five hundred thirty-one".