51253611420 has 96 divisors (see below), whose sum is σ = 156620169216. Its totient is φ = 12420064000.

The previous prime is 51253611377. The next prime is 51253611427. The reversal of 51253611420 is 2411635215.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51253611427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1758970 + ... + 1787870.

It is an arithmetic number, because the mean of its divisors is an integer number (1631460096).

Almost surely, 2^51253611420 is an apocalyptic number.

It is an amenable number.

51253611420 is an abundant number, since it is smaller than the sum of its proper divisors (105366557796).

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

51253611420 is a wasteful number, since it uses less digits than its factorization.

51253611420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31611 (or 31609 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 51253611420 in words is "fifty-one billion, two hundred fifty-three million, six hundred eleven thousand, four hundred twenty".