55310291 has 2 divisors, whose sum is σ = 55310292. Its totient is φ = 55310290.

The previous prime is 55310267. The next prime is 55310303. The reversal of 55310291 is 19201355.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55310291 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55310291.

It is not a weakly prime, because it can be changed into another prime (55310201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27655145 + 27655146.

It is an arithmetic number, because the mean of its divisors is an integer number (27655146).

Almost surely, 2^55310291 is an apocalyptic number.

55310291 is a deficient number, since it is larger than the sum of its proper divisors (1).

55310291 is an equidigital number, since it uses as much as digits as its factorization.

55310291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 55310291 is about 7437.0888793936. The cubic root of 55310291 is about 381.0090701726.

The spelling of 55310291 in words is "fifty-five million, three hundred ten thousand, two hundred ninety-one".