51253400430 has 40 divisors (see below), whose sum is σ = 137814701112. Its totient is φ = 13667573232.

The previous prime is 51253400389. The next prime is 51253400441. The reversal of 51253400430 is 3400435215.

51253400430 is a `hidden beast` number, since 5 + 1 + 253 + 400 + 4 + 3 + 0 = 666.

It is a super-2 number, since 2×51253400430² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 51253400394 and 51253400403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31637092 + ... + 31638711.

Almost surely, 2^51253400430 is an apocalyptic number.

51253400430 is an abundant number, since it is smaller than the sum of its proper divisors (86561300682).

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

51253400430 is a wasteful number, since it uses less digits than its factorization.

51253400430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63275822 (or 63275813 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 51253400430 its reverse (3400435215), we get a palindrome (54653835645).

The spelling of 51253400430 in words is "fifty-one billion, two hundred fifty-three million, four hundred thousand, four hundred thirty".