85277731 has 8 divisors (see below), whose sum is σ = 106320384. Its totient is φ = 66450120.

The previous prime is 85277713. The next prime is 85277743. The reversal of 85277731 is 13777258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85277731 - 2²³ = 76889123 is a prime.

It is a super-2 number, since 2×85277731² = 14544582809016722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85277701) 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, 553675 + ... + 553828.

It is an arithmetic number, because the mean of its divisors is an integer number (13290048).

Almost surely, 2^85277731 is an apocalyptic number.

85277731 is a deficient number, since it is larger than the sum of its proper divisors (21042653).

85277731 is a wasteful number, since it uses less digits than its factorization.

85277731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107521.

The product of its digits is 82320, while the sum is 40.

The square root of 85277731 is about 9234.5942520503. The cubic root of 85277731 is about 440.1613234202.

The spelling of 85277731 in words is "eighty-five million, two hundred seventy-seven thousand, seven hundred thirty-one".