51512203369 has 27 divisors (see below), whose sum is σ = 57983262141. Its totient is φ = 45728505240.

The previous prime is 51512203367. The next prime is 51512203399. The reversal of 51512203369 is 96330221515.

The square root of 51512203369 is 226963.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 51512203369 - 2¹ = 51512203367 is a prime.

It is a super-2 number, since 2×51512203369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51512203363) 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 26 ways as a sum of consecutive naturals, for example, 117339652 + ... + 117340090.

Almost surely, 2^51512203369 is an apocalyptic number.

51512203369 is the 226963-rd square number.

51512203369 is the 113482-nd centered octagonal number.

It is an amenable number.

51512203369 is a deficient number, since it is larger than the sum of its proper divisors (6471058772).

51512203369 is an frugal number, since it uses more digits than its factorization.

51512203369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 37.

The spelling of 51512203369 in words is "fifty-one billion, five hundred twelve million, two hundred three thousand, three hundred sixty-nine".