87773231 has 16 divisors (see below), whose sum is σ = 109032000. Its totient is φ = 68802048.

The previous prime is 87773209. The next prime is 87773233. The reversal of 87773231 is 13237778.

It is not a de Polignac number, because 87773231 - 2¹⁴ = 87756847 is a prime.

It is a super-2 number, since 2×87773231² = 15408280160358722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87773233) 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, 5495 + ... + 14343.

It is an arithmetic number, because the mean of its divisors is an integer number (6814500).

Almost surely, 2^87773231 is an apocalyptic number.

87773231 is a deficient number, since it is larger than the sum of its proper divisors (21258769).

87773231 is a wasteful number, since it uses less digits than its factorization.

87773231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8978.

The product of its digits is 49392, while the sum is 38.

The square root of 87773231 is about 9368.7368945872. The cubic root of 87773231 is about 444.4136214712.

The spelling of 87773231 in words is "eighty-seven million, seven hundred seventy-three thousand, two hundred thirty-one".