85721022 has 24 divisors (see below), whose sum is σ = 187070520. Its totient is φ = 28367280.

The previous prime is 85720993. The next prime is 85721047. The reversal of 85721022 is 22012758.

It is a super-2 number, since 2×85721022² = 14696187225448968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14629 + ... + 19632.

It is an arithmetic number, because the mean of its divisors is an integer number (7794605).

Almost surely, 2^85721022 is an apocalyptic number.

85721022 is an abundant number, since it is smaller than the sum of its proper divisors (101349498).

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

85721022 is a wasteful number, since it uses less digits than its factorization.

85721022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34408 (or 34405 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 85721022 is about 9258.5647915862. The cubic root of 85721022 is about 440.9226884079.

The spelling of 85721022 in words is "eighty-five million, seven hundred twenty-one thousand, twenty-two".