85721572 has 24 divisors (see below), whose sum is σ = 157489920. Its totient is φ = 40771680.

The previous prime is 85721569. The next prime is 85721627. The reversal of 85721572 is 27512758.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1458 + ... + 13174.

It is an arithmetic number, because the mean of its divisors is an integer number (6562080).

Almost surely, 2^85721572 is an apocalyptic number.

It is an amenable number.

85721572 is a deficient number, since it is larger than the sum of its proper divisors (71768348).

85721572 is a wasteful number, since it uses less digits than its factorization.

85721572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11811 (or 11809 counting only the distinct ones).

The product of its digits is 39200, while the sum is 37.

The square root of 85721572 is about 9258.5944937663. The cubic root of 85721572 is about 440.9236314164.

The spelling of 85721572 in words is "eighty-five million, seven hundred twenty-one thousand, five hundred seventy-two".