31276747273021 has 16 divisors (see below), whose sum is σ = 31434686403120. Its totient is φ = 31119019476480.

The previous prime is 31276747272973. The next prime is 31276747273049. The reversal of 31276747273021 is 12037274767213.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4771651416921 + 26505095856100 = 2184411^2 + 5148310^2 .

It is a cyclic number.

It is not a de Polignac number, because 31276747273021 - 2¹¹ = 31276747270973 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 31276747273021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31276747273081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3084182611 + ... + 3084192751.

It is an arithmetic number, because the mean of its divisors is an integer number (1964667900195).

Almost surely, 2^{31276747273021} is an apocalyptic number.

It is an amenable number.

31276747273021 is a deficient number, since it is larger than the sum of its proper divisors (157939130099).

31276747273021 is a wasteful number, since it uses less digits than its factorization.

31276747273021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19056.

The product of its (nonzero) digits is 4148928, while the sum is 52.

The spelling of 31276747273021 in words is "thirty-one trillion, two hundred seventy-six billion, seven hundred forty-seven million, two hundred seventy-three thousand, twenty-one".