55144657 has 2 divisors, whose sum is σ = 55144658. Its totient is φ = 55144656.

The previous prime is 55144643. The next prime is 55144673. The reversal of 55144657 is 75644155.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53714241 + 1430416 = 7329^2 + 1196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55144657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55144627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27572328 + 27572329.

It is an arithmetic number, because the mean of its divisors is an integer number (27572329).

Almost surely, 2^55144657 is an apocalyptic number.

It is an amenable number.

55144657 is a deficient number, since it is larger than the sum of its proper divisors (1).

55144657 is an equidigital number, since it uses as much as digits as its factorization.

55144657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 37.

The square root of 55144657 is about 7425.9448557069. The cubic root of 55144657 is about 380.6283624999.

The spelling of 55144657 in words is "fifty-five million, one hundred forty-four thousand, six hundred fifty-seven".