51152201631 has 12 divisors (see below), whose sum is σ = 73993449400. Its totient is φ = 34052112720.

The previous prime is 51152201599. The next prime is 51152201647. The reversal of 51152201631 is 13610225115.

51152201631 is a `hidden beast` number, since 5 + 1 + 1 + 5 + 2 + 20 + 1 + 631 = 666.

It is not a de Polignac number, because 51152201631 - 2⁵ = 51152201599 is a prime.

It is a super-2 number, since 2×51152201631² (a number of 22 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 = 51152201595 and 51152201604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51152201131) 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, 4106356 + ... + 4118793.

Almost surely, 2^51152201631 is an apocalyptic number.

51152201631 is a deficient number, since it is larger than the sum of its proper divisors (22841247769).

51152201631 is a wasteful number, since it uses less digits than its factorization.

51152201631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8225846 (or 8225843 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 51152201631 its reverse (13610225115), we get a palindrome (64762426746).

The spelling of 51152201631 in words is "fifty-one billion, one hundred fifty-two million, two hundred one thousand, six hundred thirty-one".