80897531 has 16 divisors (see below), whose sum is σ = 95424000. Its totient is φ = 67612320.

The previous prime is 80897513. The next prime is 80897533. The reversal of 80897531 is 13579808.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 80897531 - 2¹⁰ = 80896507 is a prime.

It is a super-2 number, since 2×80897531² = 13088821043791922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80897533) 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, 39470 + ... + 41468.

It is an arithmetic number, because the mean of its divisors is an integer number (5964000).

Almost surely, 2^80897531 is an apocalyptic number.

80897531 is a deficient number, since it is larger than the sum of its proper divisors (14526469).

80897531 is a wasteful number, since it uses less digits than its factorization.

80897531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 80897531 is about 8994.3054762444. The cubic root of 80897531 is about 432.4923424084.

The spelling of 80897531 in words is "eighty million, eight hundred ninety-seven thousand, five hundred thirty-one".