87275931 has 8 divisors (see below), whose sum is σ = 116443200. Its totient is φ = 58146312.

The previous prime is 87275899. The next prime is 87275957. The reversal of 87275931 is 13957278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87275931 - 2⁵ = 87275899 is a prime.

It is a super-2 number, since 2×87275931² = 15234176263833522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (87275971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3465 + ... + 13658.

It is an arithmetic number, because the mean of its divisors is an integer number (14555400).

Almost surely, 2^87275931 is an apocalyptic number.

87275931 is the 5909-th centered pentagonal number.

87275931 is a deficient number, since it is larger than the sum of its proper divisors (29167269).

87275931 is a wasteful number, since it uses less digits than its factorization.

87275931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18825.

The product of its digits is 105840, while the sum is 42.

The square root of 87275931 is about 9342.1587976227. The cubic root of 87275931 is about 443.5727211984.

The spelling of 87275931 in words is "eighty-seven million, two hundred seventy-five thousand, nine hundred thirty-one".