51101422400 has 84 divisors (see below), whose sum is σ = 143704531488. Its totient is φ = 17520483840.

The previous prime is 51101422387. The next prime is 51101422403. The reversal of 51101422400 is 422410115.

It is a happy number.

51101422400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51101422400² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51101422403) 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, 2270114 + ... + 2292513.

It is an arithmetic number, because the mean of its divisors is an integer number (1710768232).

Almost surely, 2^51101422400 is an apocalyptic number.

51101422400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51101422400 is an abundant number, since it is smaller than the sum of its proper divisors (92603109088).

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

51101422400 is a wasteful number, since it uses less digits than its factorization.

51101422400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4562656 (or 4562641 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 51101422400 its reverse (422410115), we get a palindrome (51523832515).

The spelling of 51101422400 in words is "fifty-one billion, one hundred one million, four hundred twenty-two thousand, four hundred".