80071931 has 4 divisors (see below), whose sum is σ = 80407200. Its totient is φ = 79736664.

The previous prime is 80071907. The next prime is 80071939. The reversal of 80071931 is 13917008.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80071931 is a prime.

It is a super-2 number, since 2×80071931² = 12823028268137522, 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 = 80071894 and 80071903.

It is not an unprimeable number, because it can be changed into a prime (80071939) 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, 167276 + ... + 167753.

It is an arithmetic number, because the mean of its divisors is an integer number (20101800).

Almost surely, 2^80071931 is an apocalyptic number.

80071931 is a deficient number, since it is larger than the sum of its proper divisors (335269).

80071931 is a wasteful number, since it uses less digits than its factorization.

80071931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335268.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 80071931 is about 8948.2920716749. The cubic root of 80071931 is about 431.0160415216.

Adding to 80071931 its reverse (13917008), we get a palindrome (93988939).

The spelling of 80071931 in words is "eighty million, seventy-one thousand, nine hundred thirty-one".