85715172 has 30 divisors (see below), whose sum is σ = 224077238. Its totient is φ = 28571616.

The previous prime is 85715171. The next prime is 85715183. The reversal of 85715172 is 27151758.

It can be written as a sum of positive squares in only one way, i.e., 49787136 + 35928036 = 7056^2 + 5994^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (85715171) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 131953 + ... + 132600.

Almost surely, 2^85715172 is an apocalyptic number.

It is an amenable number.

85715172 is an abundant number, since it is smaller than the sum of its proper divisors (138362066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85715172 is a wasteful number, since it uses less digits than its factorization.

85715172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264569 (or 264558 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 85715172 is about 9258.2488625009. The cubic root of 85715172 is about 440.9126579769.

The spelling of 85715172 in words is "eighty-five million, seven hundred fifteen thousand, one hundred seventy-two".