51263506253 has 16 divisors (see below), whose sum is σ = 54571847424. Its totient is φ = 48088054080.

The previous prime is 51263506243. The next prime is 51263506267. The reversal of 51263506253 is 35260536215.

It is a cyclic number.

It is not a de Polignac number, because 51263506253 - 2³⁴ = 34083637069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51263506213) 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, 103478 + ... + 336503.

It is an arithmetic number, because the mean of its divisors is an integer number (3410740464).

Almost surely, 2^51263506253 is an apocalyptic number.

It is an amenable number.

51263506253 is a deficient number, since it is larger than the sum of its proper divisors (3308341171).

51263506253 is a wasteful number, since it uses less digits than its factorization.

51263506253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440132.

The product of its (nonzero) digits is 162000, while the sum is 38.

The spelling of 51263506253 in words is "fifty-one billion, two hundred sixty-three million, five hundred six thousand, two hundred fifty-three".