87236231 has 4 divisors (see below), whose sum is σ = 92367792. Its totient is φ = 82104672.

The previous prime is 87236221. The next prime is 87236323. The reversal of 87236231 is 13263278.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87236231 is a prime.

It is a super-2 number, since 2×87236231² = 15220319998170722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87236221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2565755 + ... + 2565788.

It is an arithmetic number, because the mean of its divisors is an integer number (23091948).

Almost surely, 2^87236231 is an apocalyptic number.

87236231 is a deficient number, since it is larger than the sum of its proper divisors (5131561).

87236231 is a wasteful number, since it uses less digits than its factorization.

87236231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5131560.

The product of its digits is 12096, while the sum is 32.

The square root of 87236231 is about 9340.0337793822. The cubic root of 87236231 is about 443.5054536726.

The spelling of 87236231 in words is "eighty-seven million, two hundred thirty-six thousand, two hundred thirty-one".