31144565427 has 16 divisors (see below), whose sum is σ = 42547226400. Its totient is φ = 20252672000.

The previous prime is 31144565423. The next prime is 31144565429. The reversal of 31144565427 is 72456544113.

It is a cyclic number.

It is not a de Polignac number, because 31144565427 - 2² = 31144565423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31144565423) 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 15 ways as a sum of consecutive naturals, for example, 691699 + ... + 735347.

It is an arithmetic number, because the mean of its divisors is an integer number (2659201650).

Almost surely, 2^31144565427 is an apocalyptic number.

31144565427 is a deficient number, since it is larger than the sum of its proper divisors (11402660973).

31144565427 is a wasteful number, since it uses less digits than its factorization.

31144565427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49494.

The product of its digits is 403200, while the sum is 42.

The spelling of 31144565427 in words is "thirty-one billion, one hundred forty-four million, five hundred sixty-five thousand, four hundred twenty-seven".