51232403420 has 24 divisors (see below), whose sum is σ = 117368779248. Its totient is φ = 18629964800.

The previous prime is 51232403393. The next prime is 51232403471. The reversal of 51232403420 is 2430423215.

It is a self number, because there is not a number n which added to its sum of digits gives 51232403420.

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 7 ways as a sum of consecutive naturals, for example, 116437061 + ... + 116437500.

It is an arithmetic number, because the mean of its divisors is an integer number (4890365802).

Almost surely, 2^51232403420 is an apocalyptic number.

It is an amenable number.

51232403420 is an abundant number, since it is smaller than the sum of its proper divisors (66136375828).

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

51232403420 is a wasteful number, since it uses less digits than its factorization.

51232403420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232874581 (or 232874579 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 51232403420 its reverse (2430423215), we get a palindrome (53662826635).

The spelling of 51232403420 in words is "fifty-one billion, two hundred thirty-two million, four hundred three thousand, four hundred twenty".