51335512231 has 2 divisors, whose sum is σ = 51335512232. Its totient is φ = 51335512230.

The previous prime is 51335512223. The next prime is 51335512247. The reversal of 51335512231 is 13221553315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51335512231 - 2³ = 51335512223 is a prime.

It is a super-2 number, since 2×51335512231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51335512193 and 51335512202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51335512931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25667756115 + 25667756116.

It is an arithmetic number, because the mean of its divisors is an integer number (25667756116).

Almost surely, 2^51335512231 is an apocalyptic number.

51335512231 is a deficient number, since it is larger than the sum of its proper divisors (1).

51335512231 is an equidigital number, since it uses as much as digits as its factorization.

51335512231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13500, while the sum is 31.

The spelling of 51335512231 in words is "fifty-one billion, three hundred thirty-five million, five hundred twelve thousand, two hundred thirty-one".