55330237 has 2 divisors, whose sum is σ = 55330238. Its totient is φ = 55330236.

The previous prime is 55330211. The next prime is 55330271. The reversal of 55330237 is 73203355.

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., 43178041 + 12152196 = 6571^2 + 3486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55330237 is a prime.

It is a super-2 number, since 2×55330237² = 6122870252952338, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50330237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27665118 + 27665119.

It is an arithmetic number, because the mean of its divisors is an integer number (27665119).

Almost surely, 2^55330237 is an apocalyptic number.

It is an amenable number.

55330237 is a deficient number, since it is larger than the sum of its proper divisors (1).

55330237 is an equidigital number, since it uses as much as digits as its factorization.

55330237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 28.

The square root of 55330237 is about 7438.4297402073. The cubic root of 55330237 is about 381.0548645051.

The spelling of 55330237 in words is "fifty-five million, three hundred thirty thousand, two hundred thirty-seven".