51431112553 has 8 divisors (see below), whose sum is σ = 52851548360. Its totient is φ = 50012277120.

The previous prime is 51431112547. The next prime is 51431112569. The reversal of 51431112553 is 35521113415.

It can be written as a sum of positive squares in 4 ways, for example, as 8444139664 + 42986972889 = 91892^2 + 207333^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51431112553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51431112653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334788 + ... + 463621.

It is an arithmetic number, because the mean of its divisors is an integer number (6606443545).

Almost surely, 2^51431112553 is an apocalyptic number.

It is an amenable number.

51431112553 is a deficient number, since it is larger than the sum of its proper divisors (1420435807).

51431112553 is a wasteful number, since it uses less digits than its factorization.

51431112553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800187.

The product of its digits is 9000, while the sum is 31.

Adding to 51431112553 its reverse (35521113415), we get a palindrome (86952225968).

The spelling of 51431112553 in words is "fifty-one billion, four hundred thirty-one million, one hundred twelve thousand, five hundred fifty-three".