51285351331 has 2 divisors, whose sum is σ = 51285351332. Its totient is φ = 51285351330.

The previous prime is 51285351329. The next prime is 51285351353. The reversal of 51285351331 is 13315358215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51285351331 - 2¹ = 51285351329 is a prime.

It is a super-2 number, since 2×51285351331² (a number of 22 digits) contains 22 as substring.

Together with 51285351329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51285351031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25642675665 + 25642675666.

It is an arithmetic number, because the mean of its divisors is an integer number (25642675666).

Almost surely, 2^51285351331 is an apocalyptic number.

51285351331 is a deficient number, since it is larger than the sum of its proper divisors (1).

51285351331 is an equidigital number, since it uses as much as digits as its factorization.

51285351331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 37.

The spelling of 51285351331 in words is "fifty-one billion, two hundred eighty-five million, three hundred fifty-one thousand, three hundred thirty-one".