85311057 has 8 divisors (see below), whose sum is σ = 122497984. Its totient is φ = 52499088.

The previous prime is 85311053. The next prime is 85311059. The reversal of 85311057 is 75011358.

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

It is not a de Polignac number, because 85311057 - 2² = 85311053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85311053) 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, 1093693 + ... + 1093770.

It is an arithmetic number, because the mean of its divisors is an integer number (15312248).

Almost surely, 2^85311057 is an apocalyptic number.

It is an amenable number.

85311057 is a deficient number, since it is larger than the sum of its proper divisors (37186927).

85311057 is a wasteful number, since it uses less digits than its factorization.

85311057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187479.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 85311057 is about 9236.3984864232. The cubic root of 85311057 is about 440.2186533768.

The spelling of 85311057 in words is "eighty-five million, three hundred eleven thousand, fifty-seven".