80517831 has 16 divisors (see below), whose sum is σ = 115603200. Its totient is φ = 49662848.

The previous prime is 80517817. The next prime is 80517841. The reversal of 80517831 is 13871508.

It is not a de Polignac number, because 80517831 - 2²³ = 72129223 is a prime.

It is a super-2 number, since 2×80517831² = 12966242217889122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80517792 and 80517801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80517841) 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, 10371 + ... + 16388.

It is an arithmetic number, because the mean of its divisors is an integer number (7225200).

Almost surely, 2^80517831 is an apocalyptic number.

80517831 is a deficient number, since it is larger than the sum of its proper divisors (35085369).

80517831 is a wasteful number, since it uses less digits than its factorization.

80517831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26838.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 80517831 is about 8973.1728502242. The cubic root of 80517831 is about 431.8146334784.

The spelling of 80517831 in words is "eighty million, five hundred seventeen thousand, eight hundred thirty-one".