51400135400 has 48 divisors (see below), whose sum is σ = 121289007840. Its totient is φ = 20253182400.

The previous prime is 51400135393. The next prime is 51400135417. The reversal of 51400135400 is 453100415.

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, 1904516 + ... + 1931315.

It is an arithmetic number, because the mean of its divisors is an integer number (2526854330).

Almost surely, 2^51400135400 is an apocalyptic number.

51400135400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51400135400 is an abundant number, since it is smaller than the sum of its proper divisors (69888872440).

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

51400135400 is a wasteful number, since it uses less digits than its factorization.

51400135400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3835914 (or 3835905 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 51400135400 its reverse (453100415), we get a palindrome (51853235815).

The spelling of 51400135400 in words is "fifty-one billion, four hundred million, one hundred thirty-five thousand, four hundred".