31351011133 has 16 divisors (see below), whose sum is σ = 34041680176. Its totient is φ = 28700904960.

The previous prime is 31351011119. The next prime is 31351011149. The reversal of 31351011133 is 33111015313.

It can be written as a sum of positive squares in 8 ways, for example, as 45724644 + 31305286489 = 6762^2 + 176933^2 .

It is not a de Polignac number, because 31351011133 - 2²⁵ = 31317456701 is a prime.

It is a super-2 number, since 2×31351011133² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31351011173) 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, 1089985 + ... + 1118377.

It is an arithmetic number, because the mean of its divisors is an integer number (2127605011).

Almost surely, 2^31351011133 is an apocalyptic number.

It is an amenable number.

31351011133 is a deficient number, since it is larger than the sum of its proper divisors (2690669043).

31351011133 is a wasteful number, since it uses less digits than its factorization.

31351011133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29104.

The product of its (nonzero) digits is 405, while the sum is 22.

Adding to 31351011133 its reverse (33111015313), we get a palindrome (64462026446).

The spelling of 31351011133 in words is "thirty-one billion, three hundred fifty-one million, eleven thousand, one hundred thirty-three".