51620263131 has 16 divisors (see below), whose sum is σ = 69301908000. Its totient is φ = 34176150528.

The previous prime is 51620263091. The next prime is 51620263133. The reversal of 51620263131 is 13136202615.

51620263131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51620263131 - 2¹⁴ = 51620246747 is a prime.

It is a super-2 number, since 2×51620263131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51620263133) 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, 4328605 + ... + 4340513.

It is an arithmetic number, because the mean of its divisors is an integer number (4331369250).

Almost surely, 2^51620263131 is an apocalyptic number.

51620263131 is a deficient number, since it is larger than the sum of its proper divisors (17681644869).

51620263131 is a wasteful number, since it uses less digits than its factorization.

51620263131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21758.

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 51620263131 its reverse (13136202615), we get a palindrome (64756465746).

The spelling of 51620263131 in words is "fifty-one billion, six hundred twenty million, two hundred sixty-three thousand, one hundred thirty-one".