87522172 has 12 divisors (see below), whose sum is σ = 155009736. Its totient is φ = 43233680.

The previous prime is 87522163. The next prime is 87522209. The reversal of 87522172 is 27122578.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131479 + ... + 132142.

It is an arithmetic number, because the mean of its divisors is an integer number (12917478).

Almost surely, 2^87522172 is an apocalyptic number.

It is an amenable number.

87522172 is a deficient number, since it is larger than the sum of its proper divisors (67487564).

87522172 is a wasteful number, since it uses less digits than its factorization.

87522172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263708 (or 263706 counting only the distinct ones).

The product of its digits is 15680, while the sum is 34.

The square root of 87522172 is about 9355.3285351184. The cubic root of 87522172 is about 443.9894960045.

The spelling of 87522172 in words is "eighty-seven million, five hundred twenty-two thousand, one hundred seventy-two".