80685531 has 16 divisors (see below), whose sum is σ = 120880800. Its totient is φ = 53184384.

The previous prime is 80685463. The next prime is 80685547. The reversal of 80685531 is 13558608.

It is not a de Polignac number, because 80685531 - 2¹⁵ = 80652763 is a prime.

It is a super-2 number, since 2×80685531² = 13020309825503922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80685131) 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, 14386 + ... + 19191.

It is an arithmetic number, because the mean of its divisors is an integer number (7555050).

Almost surely, 2^80685531 is an apocalyptic number.

80685531 is a deficient number, since it is larger than the sum of its proper divisors (40195269).

80685531 is a wasteful number, since it uses less digits than its factorization.

80685531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33675 (or 33669 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 80685531 is about 8982.5125104282. The cubic root of 80685531 is about 432.1142155563.

The spelling of 80685531 in words is "eighty million, six hundred eighty-five thousand, five hundred thirty-one".