87403251 has 32 divisors (see below), whose sum is σ = 128520000. Its totient is φ = 52825344.

The previous prime is 87403247. The next prime is 87403357. The reversal of 87403251 is 15230478.

It is not a de Polignac number, because 87403251 - 2² = 87403247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87403231) 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, 586525 + ... + 586673.

It is an arithmetic number, because the mean of its divisors is an integer number (4016250).

Almost surely, 2^87403251 is an apocalyptic number.

87403251 is a deficient number, since it is larger than the sum of its proper divisors (41116749).

87403251 is a wasteful number, since it uses less digits than its factorization.

87403251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 87403251 is about 9348.9705850430. The cubic root of 87403251 is about 443.7883141949.

The spelling of 87403251 in words is "eighty-seven million, four hundred three thousand, two hundred fifty-one".