51001040231 has 2 divisors, whose sum is σ = 51001040232. Its totient is φ = 51001040230.

The previous prime is 51001040219. The next prime is 51001040297. The reversal of 51001040231 is 13204010015.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51001040231 is a prime.

It is a super-2 number, since 2×51001040231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51001042231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25500520115 + 25500520116.

It is an arithmetic number, because the mean of its divisors is an integer number (25500520116).

Almost surely, 2^51001040231 is an apocalyptic number.

51001040231 is a deficient number, since it is larger than the sum of its proper divisors (1).

51001040231 is an equidigital number, since it uses as much as digits as its factorization.

51001040231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 51001040231 its reverse (13204010015), we get a palindrome (64205050246).

The spelling of 51001040231 in words is "fifty-one billion, one million, forty thousand, two hundred thirty-one".