31311422421025 has 12 divisors (see below), whose sum is σ = 38847721972204. Its totient is φ = 25035229440000.

The previous prime is 31311422421023. The next prime is 31311422421029. The reversal of 31311422421025 is 52012422411313.

It can be written as a sum of positive squares in 6 ways, for example, as 1812696020496 + 29498726400529 = 1346364^2 + 5431273^2 .

It is not a de Polignac number, because 31311422421025 - 2¹ = 31311422421023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311422421023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 347666496 + ... + 347756545.

Almost surely, 2^{31311422421025} is an apocalyptic number.

It is an amenable number.

31311422421025 is a deficient number, since it is larger than the sum of its proper divisors (7536299551179).

31311422421025 is a wasteful number, since it uses less digits than its factorization.

31311422421025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695424852 (or 695424847 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 31311422421025 its reverse (52012422411313), we get a palindrome (83323844832338).

The spelling of 31311422421025 in words is "thirty-one trillion, three hundred eleven billion, four hundred twenty-two million, four hundred twenty-one thousand, twenty-five".