65512172 has 48 divisors (see below), whose sum is σ = 129669120. Its totient is φ = 28704000.

The previous prime is 65512157. The next prime is 65512199. The reversal of 65512172 is 27121556.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163172 + ... + 163572.

It is an arithmetic number, because the mean of its divisors is an integer number (2701440).

Almost surely, 2^65512172 is an apocalyptic number.

It is an amenable number.

65512172 is a deficient number, since it is larger than the sum of its proper divisors (64156948).

65512172 is a wasteful number, since it uses less digits than its factorization.

65512172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 540 counting only the distinct ones).

The product of its digits is 4200, while the sum is 29.

The square root of 65512172 is about 8093.9589818580. The cubic root of 65512172 is about 403.1258670895.

The spelling of 65512172 in words is "sixty-five million, five hundred twelve thousand, one hundred seventy-two".