87091251 has 16 divisors (see below), whose sum is σ = 125287680. Its totient is φ = 53494560.

The previous prime is 87091201. The next prime is 87091253. The reversal of 87091251 is 15219078.

It is not a de Polignac number, because 87091251 - 2¹¹ = 87089203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87091253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22840 + ... + 26378.

It is an arithmetic number, because the mean of its divisors is an integer number (7830480).

Almost surely, 2^87091251 is an apocalyptic number.

87091251 is a deficient number, since it is larger than the sum of its proper divisors (38196429).

87091251 is a wasteful number, since it uses less digits than its factorization.

87091251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 87091251 is about 9332.2693381621. The cubic root of 87091251 is about 443.2596266307.

The spelling of 87091251 in words is "eighty-seven million, ninety-one thousand, two hundred fifty-one".