87222865 has 16 divisors (see below), whose sum is σ = 108564480. Its totient is φ = 67193280.

The previous prime is 87222859. The next prime is 87222887. The reversal of 87222865 is 56822278.

It is not a de Polignac number, because 87222865 - 2⁹ = 87222353 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 87520 + ... + 88510.

It is an arithmetic number, because the mean of its divisors is an integer number (6785280).

Almost surely, 2^87222865 is an apocalyptic number.

It is an amenable number.

87222865 is a deficient number, since it is larger than the sum of its proper divisors (21341615).

87222865 is a wasteful number, since it uses less digits than its factorization.

87222865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632.

The product of its digits is 107520, while the sum is 40.

The square root of 87222865 is about 9339.3182299352. The cubic root of 87222865 is about 443.4828017821.

The spelling of 87222865 in words is "eighty-seven million, two hundred twenty-two thousand, eight hundred sixty-five".