51255231115331 has 4 divisors (see below), whose sum is σ = 51255249093552. Its totient is φ = 51255213137112.

The previous prime is 51255231115243. The next prime is 51255231115343. The reversal of 51255231115331 is 13351113255215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51255231115331 is a prime.

It is a super-2 number, since 2×51255231115331² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51255231115031) 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, 3659276 + ... + 10765721.

It is an arithmetic number, because the mean of its divisors is an integer number (12813812273388).

Almost surely, 2^{51255231115331} is an apocalyptic number.

51255231115331 is a deficient number, since it is larger than the sum of its proper divisors (17978221).

51255231115331 is a wasteful number, since it uses less digits than its factorization.

51255231115331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17978220.

The product of its digits is 67500, while the sum is 38.

The spelling of 51255231115331 in words is "fifty-one trillion, two hundred fifty-five billion, two hundred thirty-one million, one hundred fifteen thousand, three hundred thirty-one".