51451522231 has 2 divisors, whose sum is σ = 51451522232. Its totient is φ = 51451522230.

The previous prime is 51451522223. The next prime is 51451522253. The reversal of 51451522231 is 13222515415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51451522231 - 2³ = 51451522223 is a prime.

It is a super-2 number, since 2×51451522231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51451522193 and 51451522202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51451522211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25725761115 + 25725761116.

It is an arithmetic number, because the mean of its divisors is an integer number (25725761116).

Almost surely, 2^51451522231 is an apocalyptic number.

51451522231 is a deficient number, since it is larger than the sum of its proper divisors (1).

51451522231 is an equidigital number, since it uses as much as digits as its factorization.

51451522231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 31.

The spelling of 51451522231 in words is "fifty-one billion, four hundred fifty-one million, five hundred twenty-two thousand, two hundred thirty-one".