51125501400 has 48 divisors (see below), whose sum is σ = 158489056200. Its totient is φ = 13633466880.

The previous prime is 51125501387. The next prime is 51125501411. The reversal of 51125501400 is 410552115.

It is a super-2 number, since 2×51125501400² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42603985 + ... + 42605184.

Almost surely, 2^51125501400 is an apocalyptic number.

51125501400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51125501400 is an abundant number, since it is smaller than the sum of its proper divisors (107363554800).

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

51125501400 is a wasteful number, since it uses less digits than its factorization.

51125501400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85209188 (or 85209179 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The spelling of 51125501400 in words is "fifty-one billion, one hundred twenty-five million, five hundred one thousand, four hundred".