51255272313400 has 24 divisors (see below), whose sum is σ = 119168508129120. Its totient is φ = 20502108925280.

The previous prime is 51255272313359. The next prime is 51255272313407. The reversal of 51255272313400 is 431327255215.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51255272313407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128138180584 + ... + 128138180983.

It is an arithmetic number, because the mean of its divisors is an integer number (4965354505380).

Almost surely, 2^{51255272313400} is an apocalyptic number.

51255272313400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51255272313400 is an abundant number, since it is smaller than the sum of its proper divisors (67913235815720).

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

51255272313400 is a wasteful number, since it uses less digits than its factorization.

51255272313400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256276361583 (or 256276361574 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 40.

Adding to 51255272313400 its reverse (431327255215), we get a palindrome (51686599568615).

The spelling of 51255272313400 in words is "fifty-one trillion, two hundred fifty-five billion, two hundred seventy-two million, three hundred thirteen thousand, four hundred".