311249473921 has 8 divisors (see below), whose sum is σ = 327642696800. Its totient is φ = 294857418240.

The previous prime is 311249473867. The next prime is 311249473933. The reversal of 311249473921 is 129374942113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311249473921 is a prime.

It is a super-2 number, since 2×311249473921² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311249473621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284806 + ... + 838816.

It is an arithmetic number, because the mean of its divisors is an integer number (40955337100).

Almost surely, 2^311249473921 is an apocalyptic number.

It is an amenable number.

311249473921 is a deficient number, since it is larger than the sum of its proper divisors (16393222879).

311249473921 is a wasteful number, since it uses less digits than its factorization.

311249473921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583599.

The product of its digits is 326592, while the sum is 46.

The spelling of 311249473921 in words is "three hundred eleven billion, two hundred forty-nine million, four hundred seventy-three thousand, nine hundred twenty-one".