55422491 has 2 divisors, whose sum is σ = 55422492. Its totient is φ = 55422490.

The previous prime is 55422443. The next prime is 55422551. The reversal of 55422491 is 19422455.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55422491 is a prime.

It is not a weakly prime, because it can be changed into another prime (55412491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27711245 + 27711246.

It is an arithmetic number, because the mean of its divisors is an integer number (27711246).

Almost surely, 2^55422491 is an apocalyptic number.

55422491 is a deficient number, since it is larger than the sum of its proper divisors (1).

55422491 is an equidigital number, since it uses as much as digits as its factorization.

55422491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

The square root of 55422491 is about 7444.6283318914. The cubic root of 55422491 is about 381.2665288543.

The spelling of 55422491 in words is "fifty-five million, four hundred twenty-two thousand, four hundred ninety-one".