85631057 has 8 divisors (see below), whose sum is σ = 90794592. Its totient is φ = 80481600.

The previous prime is 85631053. The next prime is 85631059. The reversal of 85631057 is 75013658.

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

It is a cyclic number.

It is not a de Polignac number, because 85631057 - 2² = 85631053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85631053) 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, 10682 + ... + 16892.

It is an arithmetic number, because the mean of its divisors is an integer number (11349324).

Almost surely, 2^85631057 is an apocalyptic number.

It is an amenable number.

85631057 is a deficient number, since it is larger than the sum of its proper divisors (5163535).

85631057 is a wasteful number, since it uses less digits than its factorization.

85631057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7039.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 85631057 is about 9253.7050417657. The cubic root of 85631057 is about 440.7683836100.

It can be divided in two parts, 856 and 31057, that added together give a palindrome (31913).

The spelling of 85631057 in words is "eighty-five million, six hundred thirty-one thousand, fifty-seven".