55231199 has 2 divisors, whose sum is σ = 55231200. Its totient is φ = 55231198.

The previous prime is 55231193. The next prime is 55231201. The reversal of 55231199 is 99113255.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55231199 is a prime.

Together with 55231201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55231193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27615599 + 27615600.

It is an arithmetic number, because the mean of its divisors is an integer number (27615600).

Almost surely, 2^55231199 is an apocalyptic number.

55231199 is a deficient number, since it is larger than the sum of its proper divisors (1).

55231199 is an equidigital number, since it uses as much as digits as its factorization.

55231199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12150, while the sum is 35.

The square root of 55231199 is about 7431.7695739306. The cubic root of 55231199 is about 380.8273731551.

The spelling of 55231199 in words is "fifty-five million, two hundred thirty-one thousand, one hundred ninety-nine".