51101136400 has 60 divisors (see below), whose sum is σ = 129992290452. Its totient is φ = 19238072320.

The previous prime is 51101136353. The next prime is 51101136407. The reversal of 51101136400 is 463110115.

It can be written as a sum of positive squares in 6 ways, for example, as 679332096 + 50421804304 = 26064^2 + 224548^2 .

It is a super-2 number, since 2×51101136400² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51101136407) 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, 3750637 + ... + 3764236.

Almost surely, 2^51101136400 is an apocalyptic number.

51101136400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51101136400 is an abundant number, since it is smaller than the sum of its proper divisors (78891154052).

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

51101136400 is a wasteful number, since it uses less digits than its factorization.

51101136400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7514908 (or 7514897 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 51101136400 its reverse (463110115), we get a palindrome (51564246515).

The spelling of 51101136400 in words is "fifty-one billion, one hundred one million, one hundred thirty-six thousand, four hundred".