311977085 has 16 divisors (see below), whose sum is σ = 430983936. Its totient is φ = 212362368.

The previous prime is 311977069. The next prime is 311977091. The reversal of 311977085 is 580779113.

It is a cyclic number.

It is not a de Polignac number, because 311977085 - 2⁴ = 311977069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27737 + ... + 37326.

It is an arithmetic number, because the mean of its divisors is an integer number (26936496).

Almost surely, 2^311977085 is an apocalyptic number.

311977085 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

311977085 is a deficient number, since it is larger than the sum of its proper divisors (119006851).

311977085 is a wasteful number, since it uses less digits than its factorization.

311977085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65212.

The product of its (nonzero) digits is 52920, while the sum is 41.

The square root of 311977085 is about 17662.8730675392. The cubic root of 311977085 is about 678.2256835787.

The spelling of 311977085 in words is "three hundred eleven million, nine hundred seventy-seven thousand, eighty-five".