87816651 has 32 divisors (see below), whose sum is σ = 136362240. Its totient is φ = 49797504.

The previous prime is 87816593. The next prime is 87816653. The reversal of 87816651 is 15661878.

It is not a de Polignac number, because 87816651 - 2⁷ = 87816523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87816653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25816 + ... + 29018.

It is an arithmetic number, because the mean of its divisors is an integer number (4261320).

Almost surely, 2^87816651 is an apocalyptic number.

87816651 is a deficient number, since it is larger than the sum of its proper divisors (48545589).

87816651 is a wasteful number, since it uses less digits than its factorization.

87816651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275.

The product of its digits is 80640, while the sum is 42.

The square root of 87816651 is about 9371.0538895046. The cubic root of 87816651 is about 444.4868908049.

The spelling of 87816651 in words is "eighty-seven million, eight hundred sixteen thousand, six hundred fifty-one".