51433321999 has 2 divisors, whose sum is σ = 51433322000. Its totient is φ = 51433321998.

The previous prime is 51433321991. The next prime is 51433322053. The reversal of 51433321999 is 99912333415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51433321999 - 2³ = 51433321991 is a prime.

It is a super-2 number, since 2×51433321999² (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 (51433321991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25716660999 + 25716661000.

It is an arithmetic number, because the mean of its divisors is an integer number (25716661000).

Almost surely, 2^51433321999 is an apocalyptic number.

51433321999 is a deficient number, since it is larger than the sum of its proper divisors (1).

51433321999 is an equidigital number, since it uses as much as digits as its factorization.

51433321999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787320, while the sum is 49.

The spelling of 51433321999 in words is "fifty-one billion, four hundred thirty-three million, three hundred twenty-one thousand, nine hundred ninety-nine".