51154239231 has 8 divisors (see below), whose sum is σ = 75784058160. Its totient is φ = 34102826136.

The previous prime is 51154239229. The next prime is 51154239247. The reversal of 51154239231 is 13293245115.

It is a happy number.

51154239231 is a `hidden beast` number, since 5 + 115 + 423 + 92 + 31 = 666.

It is not a de Polignac number, because 51154239231 - 2¹ = 51154239229 is a prime.

It is a super-2 number, since 2×51154239231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51154239221) 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, 947300700 + ... + 947300753.

It is an arithmetic number, because the mean of its divisors is an integer number (9473007270).

Almost surely, 2^51154239231 is an apocalyptic number.

51154239231 is a deficient number, since it is larger than the sum of its proper divisors (24629818929).

51154239231 is a wasteful number, since it uses less digits than its factorization.

51154239231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894601462 (or 1894601456 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The spelling of 51154239231 in words is "fifty-one billion, one hundred fifty-four million, two hundred thirty-nine thousand, two hundred thirty-one".