55147237 has 2 divisors, whose sum is σ = 55147238. Its totient is φ = 55147236.

The previous prime is 55147229. The next prime is 55147259. The reversal of 55147237 is 73274155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37957921 + 17189316 = 6161^2 + 4146^2 .

It is a cyclic number.

It is not a de Polignac number, because 55147237 - 2³ = 55147229 is a prime.

It is equal to p_3290497 and since 55147237 and 3290497 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55147207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27573618 + 27573619.

It is an arithmetic number, because the mean of its divisors is an integer number (27573619).

Almost surely, 2^55147237 is an apocalyptic number.

It is an amenable number.

55147237 is a deficient number, since it is larger than the sum of its proper divisors (1).

55147237 is an equidigital number, since it uses as much as digits as its factorization.

55147237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29400, while the sum is 34.

The square root of 55147237 is about 7426.1185689430. The cubic root of 55147237 is about 380.6342984383.

The spelling of 55147237 in words is "fifty-five million, one hundred forty-seven thousand, two hundred thirty-seven".