51221502023 has 2 divisors, whose sum is σ = 51221502024. Its totient is φ = 51221502022.

The previous prime is 51221501983. The next prime is 51221502029. The reversal of 51221502023 is 32020512215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51221502023 - 2⁸ = 51221501767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51221502023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51221502029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25610751011 + 25610751012.

It is an arithmetic number, because the mean of its divisors is an integer number (25610751012).

Almost surely, 2^51221502023 is an apocalyptic number.

51221502023 is a deficient number, since it is larger than the sum of its proper divisors (1).

51221502023 is an equidigital number, since it uses as much as digits as its factorization.

51221502023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 51221502023 in words is "fifty-one billion, two hundred twenty-one million, five hundred two thousand, twenty-three".