55995257 has 2 divisors, whose sum is σ = 55995258. Its totient is φ = 55995256.

The previous prime is 55995209. The next prime is 55995281. The reversal of 55995257 is 75259955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41165056 + 14830201 = 6416^2 + 3851^2 .

It is a cyclic number.

It is not a de Polignac number, because 55995257 - 2⁶ = 55995193 is a prime.

It is not a weakly prime, because it can be changed into another prime (55995157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27997628 + 27997629.

It is an arithmetic number, because the mean of its divisors is an integer number (27997629).

Almost surely, 2^55995257 is an apocalyptic number.

It is an amenable number.

55995257 is a deficient number, since it is larger than the sum of its proper divisors (1).

55995257 is an equidigital number, since it uses as much as digits as its factorization.

55995257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 708750, while the sum is 47.

The square root of 55995257 is about 7482.9978618198. The cubic root of 55995257 is about 382.5754350202.

The spelling of 55995257 in words is "fifty-five million, nine hundred ninety-five thousand, two hundred fifty-seven".