87051915 has 20 divisors (see below), whose sum is σ = 156049344. Its totient is φ = 46427472.

The previous prime is 87051857. The next prime is 87051931. The reversal of 87051915 is 51915078.

It is not a de Polignac number, because 87051915 - 2⁹ = 87051403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87051915.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 107067 + ... + 107876.

Almost surely, 2^87051915 is an apocalyptic number.

87051915 is a deficient number, since it is larger than the sum of its proper divisors (68997429).

87051915 is a wasteful number, since it uses less digits than its factorization.

87051915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214960 (or 214951 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 87051915 is about 9330.1615741637. The cubic root of 87051915 is about 443.1928817464.

The spelling of 87051915 in words is "eighty-seven million, fifty-one thousand, nine hundred fifteen".