51432553121 has 4 divisors (see below), whose sum is σ = 51719886000. Its totient is φ = 51145220244.

The previous prime is 51432553069. The next prime is 51432553129. The reversal of 51432553121 is 12135523415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51432553121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51432553129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143666171 + ... + 143666528.

It is an arithmetic number, because the mean of its divisors is an integer number (12929971500).

Almost surely, 2^51432553121 is an apocalyptic number.

It is an amenable number.

51432553121 is a deficient number, since it is larger than the sum of its proper divisors (287332879).

51432553121 is a wasteful number, since it uses less digits than its factorization.

51432553121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287332878.

The product of its digits is 18000, while the sum is 32.

The spelling of 51432553121 in words is "fifty-one billion, four hundred thirty-two million, five hundred fifty-three thousand, one hundred twenty-one".