80902531 has 4 divisors (see below), whose sum is σ = 82228864. Its totient is φ = 79576200.

The previous prime is 80902519. The next prime is 80902543. The reversal of 80902531 is 13520908.

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

It is an interprime number because it is at equal distance from previous prime (80902519) and next prime (80902543).

It is a cyclic number.

It is not a de Polignac number, because 80902531 - 2²³ = 72513923 is a prime.

It is a super-2 number, since 2×80902531² = 13090439044411922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80902531.

It is not an unprimeable number, because it can be changed into a prime (80902501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663075 + ... + 663196.

It is an arithmetic number, because the mean of its divisors is an integer number (20557216).

Almost surely, 2^80902531 is an apocalyptic number.

80902531 is the 4023-rd centered decagonal number.

80902531 is a deficient number, since it is larger than the sum of its proper divisors (1326333).

80902531 is a wasteful number, since it uses less digits than its factorization.

80902531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326332.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 80902531 is about 8994.5834255957. The cubic root of 80902531 is about 432.5012525162.

The spelling of 80902531 in words is "eighty million, nine hundred two thousand, five hundred thirty-one".