51356254420 has 48 divisors (see below), whose sum is σ = 109768897728. Its totient is φ = 20178385920.

The previous prime is 51356254403. The next prime is 51356254423. The reversal of 51356254420 is 2445265315.

It is a self number, because there is not a number n which added to its sum of digits gives 51356254420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51356254423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418735 + ... + 527305.

It is an arithmetic number, because the mean of its divisors is an integer number (2286852036).

Almost surely, 2^51356254420 is an apocalyptic number.

It is an amenable number.

51356254420 is an abundant number, since it is smaller than the sum of its proper divisors (58412643308).

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

51356254420 is a wasteful number, since it uses less digits than its factorization.

51356254420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109000 (or 108998 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 51356254420 in words is "fifty-one billion, three hundred fifty-six million, two hundred fifty-four thousand, four hundred twenty".