51030155420 has 24 divisors (see below), whose sum is σ = 107561714400. Its totient is φ = 20336178752.

The previous prime is 51030155381. The next prime is 51030155447. The reversal of 51030155420 is 2455103015.

It is a self number, because there is not a number n which added to its sum of digits gives 51030155420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4737200 + ... + 4747959.

It is an arithmetic number, because the mean of its divisors is an integer number (4481738100).

Almost surely, 2^51030155420 is an apocalyptic number.

It is an amenable number.

51030155420 is an abundant number, since it is smaller than the sum of its proper divisors (56531558980).

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

51030155420 is a wasteful number, since it uses less digits than its factorization.

51030155420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9485437 (or 9485435 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 51030155420 its reverse (2455103015), we get a palindrome (53485258435).

The spelling of 51030155420 in words is "fifty-one billion, thirty million, one hundred fifty-five thousand, four hundred twenty".