55719227 has 2 divisors, whose sum is σ = 55719228. Its totient is φ = 55719226.

The previous prime is 55719137. The next prime is 55719241. The reversal of 55719227 is 72291755.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55719227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55719247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27859613 + 27859614.

It is an arithmetic number, because the mean of its divisors is an integer number (27859614).

Almost surely, 2^55719227 is an apocalyptic number.

55719227 is a deficient number, since it is larger than the sum of its proper divisors (1).

55719227 is an equidigital number, since it uses as much as digits as its factorization.

55719227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44100, while the sum is 38.

The square root of 55719227 is about 7464.5312645872. The cubic root of 55719227 is about 381.9457608727.

The spelling of 55719227 in words is "fifty-five million, seven hundred nineteen thousand, two hundred twenty-seven".