55100491 has 2 divisors, whose sum is σ = 55100492. Its totient is φ = 55100490.

The previous prime is 55100489. The next prime is 55100503. The reversal of 55100491 is 19400155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55100491 - 2¹ = 55100489 is a prime.

Together with 55100489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55100411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27550245 + 27550246.

It is an arithmetic number, because the mean of its divisors is an integer number (27550246).

Almost surely, 2^55100491 is an apocalyptic number.

55100491 is a deficient number, since it is larger than the sum of its proper divisors (1).

55100491 is an equidigital number, since it uses as much as digits as its factorization.

55100491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 55100491 is about 7422.9704970450. The cubic root of 55100491 is about 380.5267187918.

The spelling of 55100491 in words is "fifty-five million, one hundred thousand, four hundred ninety-one".