65157172 has 24 divisors (see below), whose sum is σ = 116214336. Its totient is φ = 31958208.

The previous prime is 65157161. The next prime is 65157179. The reversal of 65157172 is 27175156.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65157179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65793 + ... + 66775.

It is an arithmetic number, because the mean of its divisors is an integer number (4842264).

Almost surely, 2^65157172 is an apocalyptic number.

It is an amenable number.

65157172 is a deficient number, since it is larger than the sum of its proper divisors (51057164).

65157172 is a wasteful number, since it uses less digits than its factorization.

65157172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287 (or 1285 counting only the distinct ones).

The product of its digits is 14700, while the sum is 34.

The square root of 65157172 is about 8071.9992566898. Note that the first 3 decimals coincide. The cubic root of 65157172 is about 402.3963896217.

The spelling of 65157172 in words is "sixty-five million, one hundred fifty-seven thousand, one hundred seventy-two".