55952191 has 2 divisors, whose sum is σ = 55952192. Its totient is φ = 55952190.

The previous prime is 55952173. The next prime is 55952201. The reversal of 55952191 is 19125955.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55952191 - 2²³ = 47563583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55952191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55952291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27976095 + 27976096.

It is an arithmetic number, because the mean of its divisors is an integer number (27976096).

Almost surely, 2^55952191 is an apocalyptic number.

55952191 is a deficient number, since it is larger than the sum of its proper divisors (1).

55952191 is an equidigital number, since it uses as much as digits as its factorization.

55952191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20250, while the sum is 37.

The square root of 55952191 is about 7480.1197182933. The cubic root of 55952191 is about 382.4773301671.

The spelling of 55952191 in words is "fifty-five million, nine hundred fifty-two thousand, one hundred ninety-one".