55642057 has 2 divisors, whose sum is σ = 55642058. Its totient is φ = 55642056.

The previous prime is 55642049. The next prime is 55642063. The reversal of 55642057 is 75024655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52186176 + 3455881 = 7224^2 + 1859^2 .

It is a cyclic number.

It is not a de Polignac number, because 55642057 - 2³ = 55642049 is a prime.

It is not a weakly prime, because it can be changed into another prime (55642007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27821028 + 27821029.

It is an arithmetic number, because the mean of its divisors is an integer number (27821029).

Almost surely, 2^55642057 is an apocalyptic number.

It is an amenable number.

55642057 is a deficient number, since it is larger than the sum of its proper divisors (1).

55642057 is an equidigital number, since it uses as much as digits as its factorization.

55642057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 55642057 is about 7459.3603613179. The cubic root of 55642057 is about 381.7693503603.

The spelling of 55642057 in words is "fifty-five million, six hundred forty-two thousand, fifty-seven".