51226543112400 has 720 divisors, whose sum is σ = 187440113922048. Its totient is φ = 12940010496000.

The previous prime is 51226543112377. The next prime is 51226543112413. The reversal of 51226543112400 is 421134562215.

51226543112400 is a `hidden beast` number, since 5 + 122 + 65 + 431 + 1 + 2 + 40 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1195714980 + ... + 1195757820.

Almost surely, 2^{51226543112400} is an apocalyptic number.

51226543112400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51226543112400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93720056961024).

51226543112400 is an abundant number, since it is smaller than the sum of its proper divisors (136213570809648).

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

51226543112400 is a wasteful number, since it uses less digits than its factorization.

51226543112400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43140 (or 43126 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 51226543112400 its reverse (421134562215), we get a palindrome (51647677674615).

The spelling of 51226543112400 in words is "fifty-one trillion, two hundred twenty-six billion, five hundred forty-three million, one hundred twelve thousand, four hundred".