87215653 has 16 divisors (see below), whose sum is σ = 103251456. Its totient is φ = 72117360.

The previous prime is 87215647. The next prime is 87215657. The reversal of 87215653 is 35651278.

It is a de Polignac number, because none of the positive numbers 2^k-87215653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87215657) by changing a digit.

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, 23238 + ... + 26728.

It is an arithmetic number, because the mean of its divisors is an integer number (6453216).

Almost surely, 2^87215653 is an apocalyptic number.

87215653 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

87215653 is a deficient number, since it is larger than the sum of its proper divisors (16035803).

87215653 is a wasteful number, since it uses less digits than its factorization.

87215653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3624.

The product of its digits is 50400, while the sum is 37.

The square root of 87215653 is about 9338.9321123991. The cubic root of 87215653 is about 443.4705783583.

The spelling of 87215653 in words is "eighty-seven million, two hundred fifteen thousand, six hundred fifty-three".