87221885 has 8 divisors (see below), whose sum is σ = 104860896. Its totient is φ = 69647760.

The previous prime is 87221861. The next prime is 87221903. The reversal of 87221885 is 58812278.

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

It is not a de Polignac number, because 87221885 - 2²⁴ = 70444669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13211 + ... + 18680.

It is an arithmetic number, because the mean of its divisors is an integer number (13107612).

Almost surely, 2^87221885 is an apocalyptic number.

It is an amenable number.

87221885 is a deficient number, since it is larger than the sum of its proper divisors (17639011).

87221885 is a wasteful number, since it uses less digits than its factorization.

87221885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32443.

The product of its digits is 71680, while the sum is 41.

The square root of 87221885 is about 9339.2657634313. The cubic root of 87221885 is about 443.4811408462.

The spelling of 87221885 in words is "eighty-seven million, two hundred twenty-one thousand, eight hundred eighty-five".