55418771 has 2 divisors, whose sum is σ = 55418772. Its totient is φ = 55418770.

The previous prime is 55418767. The next prime is 55418773. The reversal of 55418771 is 17781455.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55418771 - 2² = 55418767 is a prime.

It is a Sophie Germain prime.

Together with 55418773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55418773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27709385 + 27709386.

It is an arithmetic number, because the mean of its divisors is an integer number (27709386).

Almost surely, 2^55418771 is an apocalyptic number.

55418771 is a deficient number, since it is larger than the sum of its proper divisors (1).

55418771 is an equidigital number, since it uses as much as digits as its factorization.

55418771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39200, while the sum is 38.

The square root of 55418771 is about 7444.3784831240. The cubic root of 55418771 is about 381.2579983631.

The spelling of 55418771 in words is "fifty-five million, four hundred eighteen thousand, seven hundred seventy-one".