31131130133 has 8 divisors (see below), whose sum is σ = 32973803352. Its totient is φ = 29289726976.

The previous prime is 31131130123. The next prime is 31131130169. The reversal of 31131130133 is 33103113113.

It can be written as a sum of positive squares in 4 ways, for example, as 11716330564 + 19414799569 = 108242^2 + 139337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31131130133 - 2¹⁰ = 31131129109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31131130103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266810 + ... + 365307.

It is an arithmetic number, because the mean of its divisors is an integer number (4121725419).

Almost surely, 2^31131130133 is an apocalyptic number.

It is an amenable number.

31131130133 is a deficient number, since it is larger than the sum of its proper divisors (1842673219).

31131130133 is a wasteful number, since it uses less digits than its factorization.

31131130133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635031.

The product of its (nonzero) digits is 243, while the sum is 20.

Adding to 31131130133 its reverse (33103113113), we get a palindrome (64234243246).

The spelling of 31131130133 in words is "thirty-one billion, one hundred thirty-one million, one hundred thirty thousand, one hundred thirty-three".