80978331 has 48 divisors (see below), whose sum is σ = 134348544. Its totient is φ = 43154496.

The previous prime is 80978309. The next prime is 80978333. The reversal of 80978331 is 13387908.

It is not a de Polignac number, because 80978331 - 2¹⁵ = 80945563 is a prime.

It is a super-2 number, since 2×80978331² = 13114980183091122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 80978331.

It is not an unprimeable number, because it can be changed into a prime (80978333) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 145105 + ... + 145661.

It is an arithmetic number, because the mean of its divisors is an integer number (2798928).

Almost surely, 2^80978331 is an apocalyptic number.

80978331 is a deficient number, since it is larger than the sum of its proper divisors (53370213).

80978331 is a wasteful number, since it uses less digits than its factorization.

80978331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 633 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 80978331 is about 8998.7960861440. The cubic root of 80978331 is about 432.6362848043.

The spelling of 80978331 in words is "eighty million, nine hundred seventy-eight thousand, three hundred thirty-one".