55949213 has 2 divisors, whose sum is σ = 55949214. Its totient is φ = 55949212.

The previous prime is 55949197. The next prime is 55949249. The reversal of 55949213 is 31294955.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37613689 + 18335524 = 6133^2 + 4282^2 .

It is a cyclic number.

It is not a de Polignac number, because 55949213 - 2⁴ = 55949197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55949263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27974606 + 27974607.

It is an arithmetic number, because the mean of its divisors is an integer number (27974607).

Almost surely, 2^55949213 is an apocalyptic number.

It is an amenable number.

55949213 is a deficient number, since it is larger than the sum of its proper divisors (1).

55949213 is an equidigital number, since it uses as much as digits as its factorization.

55949213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 38.

The square root of 55949213 is about 7479.9206546594. The cubic root of 55949213 is about 382.4705443876.

The spelling of 55949213 in words is "fifty-five million, nine hundred forty-nine thousand, two hundred thirteen".