55585237 has 2 divisors, whose sum is σ = 55585238. Its totient is φ = 55585236.

The previous prime is 55585219. The next prime is 55585247. The reversal of 55585237 is 73258555.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28451556 + 27133681 = 5334^2 + 5209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55585237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55585237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55585247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27792618 + 27792619.

It is an arithmetic number, because the mean of its divisors is an integer number (27792619).

Almost surely, 2^55585237 is an apocalyptic number.

It is an amenable number.

55585237 is a deficient number, since it is larger than the sum of its proper divisors (1).

55585237 is an equidigital number, since it uses as much as digits as its factorization.

55585237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 210000, while the sum is 40.

The square root of 55585237 is about 7455.5507509506. The cubic root of 55585237 is about 381.6393556307.

The spelling of 55585237 in words is "fifty-five million, five hundred eighty-five thousand, two hundred thirty-seven".