311521003427 has 4 divisors (see below), whose sum is σ = 311522903016. Its totient is φ = 311519103840.

The previous prime is 311521003421. The next prime is 311521003477. The reversal of 311521003427 is 724300125113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 311521003427 - 2²⁴ = 311504226211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311521003427.

It is not an unprimeable number, because it can be changed into a prime (311521003421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677849 + ... + 1040442.

It is an arithmetic number, because the mean of its divisors is an integer number (77880725754).

Almost surely, 2^311521003427 is an apocalyptic number.

311521003427 is a deficient number, since it is larger than the sum of its proper divisors (1899589).

311521003427 is a wasteful number, since it uses less digits than its factorization.

311521003427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899588.

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 311521003427 in words is "three hundred eleven billion, five hundred twenty-one million, three thousand, four hundred twenty-seven".