802161531 has 6 divisors (see below), whose sum is σ = 1158677780. Its totient is φ = 534774348.

The previous prime is 802161527. The next prime is 802161553. The reversal of 802161531 is 135161208.

It is not a de Polignac number, because 802161531 - 2² = 802161527 is a prime.

It is a super-2 number, since 2×802161531² = 1286926243632527922, 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 = 802161495 and 802161504.

It is not an unprimeable number, because it can be changed into a prime (802168531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44564521 + ... + 44564538.

Almost surely, 2^802161531 is an apocalyptic number.

802161531 is a deficient number, since it is larger than the sum of its proper divisors (356516249).

802161531 is a wasteful number, since it uses less digits than its factorization.

802161531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89129065 (or 89129062 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 802161531 is about 28322.4563023760. The cubic root of 802161531 is about 929.1530930265.

The spelling of 802161531 in words is "eight hundred two million, one hundred sixty-one thousand, five hundred thirty-one".