55199831231999 has 2 divisors, whose sum is σ = 55199831232000. Its totient is φ = 55199831231998.

The previous prime is 55199831231977. The next prime is 55199831232031. The reversal of 55199831231999 is 99913213899155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55199831231999 - 2¹⁶ = 55199831166463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55199831231299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27599915615999 + 27599915616000.

It is an arithmetic number, because the mean of its divisors is an integer number (27599915616000).

Almost surely, 2^{55199831231999} is an apocalyptic number.

55199831231999 is a deficient number, since it is larger than the sum of its proper divisors (1).

55199831231999 is an equidigital number, since it uses as much as digits as its factorization.

55199831231999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 212576400, while the sum is 74.

The spelling of 55199831231999 in words is "fifty-five trillion, one hundred ninety-nine billion, eight hundred thirty-one million, two hundred thirty-one thousand, nine hundred ninety-nine".