51203315628 has 36 divisors (see below), whose sum is σ = 129667272280. Its totient is φ = 17036562816.

The previous prime is 51203315627. The next prime is 51203315633. The reversal of 51203315628 is 82651330215.

51203315628 is a `hidden beast` number, since 5 + 1 + 20 + 3 + 3 + 1 + 5 + 628 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51203315592 and 51203315601.

It is not an unprimeable number, because it can be changed into a prime (51203315623) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1280413 + ... + 1319796.

Almost surely, 2^51203315628 is an apocalyptic number.

It is an amenable number.

51203315628 is an abundant number, since it is smaller than the sum of its proper divisors (78463956652).

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

51203315628 is a wasteful number, since it uses less digits than its factorization.

51203315628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600766 (or 2600761 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 51203315628 in words is "fifty-one billion, two hundred three million, three hundred fifteen thousand, six hundred twenty-eight".