87372225 has 36 divisors (see below), whose sum is σ = 156997516. Its totient is φ = 46448640.

The previous prime is 87372211. The next prime is 87372247. The reversal of 87372225 is 52227378.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1272384 + 86099841 = 1128^2 + 9279^2 .

It is not a de Polignac number, because 87372225 - 2⁴ = 87372209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87372225.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 129489 + ... + 130161.

Almost surely, 2^87372225 is an apocalyptic number.

It is an amenable number.

87372225 is a deficient number, since it is larger than the sum of its proper divisors (69625291).

87372225 is a wasteful number, since it uses less digits than its factorization.

87372225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266 (or 1258 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 87372225 is about 9347.3111106885. The cubic root of 87372225 is about 443.7357966756.

The spelling of 87372225 in words is "eighty-seven million, three hundred seventy-two thousand, two hundred twenty-five".