631134165131 has 4 divisors (see below), whose sum is σ = 631169151000. Its totient is φ = 631099179264.

The previous prime is 631134165119. The next prime is 631134165139. The reversal of 631134165131 is 131561431136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631134165131 is a prime.

It is a super-2 number, since 2×631134165131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631134165091 and 631134165100.

It is not an unprimeable number, because it can be changed into a prime (631134165139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17465861 + ... + 17501958.

It is an arithmetic number, because the mean of its divisors is an integer number (157792287750).

Almost surely, 2^631134165131 is an apocalyptic number.

631134165131 is a deficient number, since it is larger than the sum of its proper divisors (34985869).

631134165131 is a wasteful number, since it uses less digits than its factorization.

631134165131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34985868.

The product of its digits is 19440, while the sum is 35.

Adding to 631134165131 its reverse (131561431136), we get a palindrome (762695596267).

The spelling of 631134165131 in words is "six hundred thirty-one billion, one hundred thirty-four million, one hundred sixty-five thousand, one hundred thirty-one".