87215051 has 48 divisors (see below), whose sum is σ = 117013248. Its totient is φ = 64209600.

The previous prime is 87215041. The next prime is 87215053. The reversal of 87215051 is 15051278.

It is not a de Polignac number, because 87215051 - 2¹⁸ = 86952907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87215053) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1228346 + ... + 1228416.

It is an arithmetic number, because the mean of its divisors is an integer number (2437776).

Almost surely, 2^87215051 is an apocalyptic number.

87215051 is a deficient number, since it is larger than the sum of its proper divisors (29798197).

87215051 is a wasteful number, since it uses less digits than its factorization.

87215051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 87215051 is about 9338.8998816777. The cubic root of 87215051 is about 443.4695580143.

The spelling of 87215051 in words is "eighty-seven million, two hundred fifteen thousand, fifty-one".