55304223991 has 2 divisors, whose sum is σ = 55304223992. Its totient is φ = 55304223990.

The previous prime is 55304223977. The next prime is 55304224013. The reversal of 55304223991 is 19932240355.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55304223991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55304229991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27652111995 + 27652111996.

It is an arithmetic number, because the mean of its divisors is an integer number (27652111996).

Almost surely, 2^55304223991 is an apocalyptic number.

55304223991 is a deficient number, since it is larger than the sum of its proper divisors (1).

55304223991 is an equidigital number, since it uses as much as digits as its factorization.

55304223991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 43.

The spelling of 55304223991 in words is "fifty-five billion, three hundred four million, two hundred twenty-three thousand, nine hundred ninety-one".