311230320999 has 64 divisors (see below), whose sum is σ = 460610562048. Its totient is φ = 185709542400.

The previous prime is 311230320991. The next prime is 311230321021. The reversal of 311230320999 is 999023032113.

It is a happy number.

It is not a de Polignac number, because 311230320999 - 2³ = 311230320991 is a prime.

It is a super-3 number, since 3×311230320999³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 311230320999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311230320991) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 278629989 + ... + 278631105.

It is an arithmetic number, because the mean of its divisors is an integer number (7197040032).

Almost surely, 2^311230320999 is an apocalyptic number.

311230320999 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

311230320999 is a deficient number, since it is larger than the sum of its proper divisors (149380241049).

311230320999 is a wasteful number, since it uses less digits than its factorization.

311230320999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088.

The product of its (nonzero) digits is 78732, while the sum is 42.

The spelling of 311230320999 in words is "three hundred eleven billion, two hundred thirty million, three hundred twenty thousand, nine hundred ninety-nine".