55317811 has 2 divisors, whose sum is σ = 55317812. Its totient is φ = 55317810.

The previous prime is 55317809. The next prime is 55317817. The reversal of 55317811 is 11871355.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55317811 - 2¹ = 55317809 is a prime.

Together with 55317809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55317817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27658905 + 27658906.

It is an arithmetic number, because the mean of its divisors is an integer number (27658906).

Almost surely, 2^55317811 is an apocalyptic number.

55317811 is a deficient number, since it is larger than the sum of its proper divisors (1).

55317811 is an equidigital number, since it uses as much as digits as its factorization.

55317811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 31.

The square root of 55317811 is about 7437.5944363752. The cubic root of 55317811 is about 381.0263367506.

The spelling of 55317811 in words is "fifty-five million, three hundred seventeen thousand, eight hundred eleven".