51131463600 has 120 divisors (see below), whose sum is σ = 187189884160. Its totient is φ = 11687189760.

The previous prime is 51131463557. The next prime is 51131463611. The reversal of 51131463600 is 636413115.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×51131463600² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3035140 + ... + 3051939.

Almost surely, 2^51131463600 is an apocalyptic number.

51131463600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51131463600 is an abundant number, since it is smaller than the sum of its proper divisors (136058420560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51131463600 is a wasteful number, since it uses less digits than its factorization.

51131463600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6087107 (or 6087096 counting only the distinct ones).

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

Adding to 51131463600 its reverse (636413115), we get a palindrome (51767876715).

The spelling of 51131463600 in words is "fifty-one billion, one hundred thirty-one million, four hundred sixty-three thousand, six hundred".