55639253 has 2 divisors, whose sum is σ = 55639254. Its totient is φ = 55639252.

The previous prime is 55639247. The next prime is 55639303. The reversal of 55639253 is 35293655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33895684 + 21743569 = 5822^2 + 4663^2 .

It is a cyclic number.

It is not a de Polignac number, because 55639253 - 2¹² = 55635157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55239253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27819626 + 27819627.

It is an arithmetic number, because the mean of its divisors is an integer number (27819627).

Almost surely, 2^55639253 is an apocalyptic number.

It is an amenable number.

55639253 is a deficient number, since it is larger than the sum of its proper divisors (1).

55639253 is an equidigital number, since it uses as much as digits as its factorization.

55639253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121500, while the sum is 38.

The square root of 55639253 is about 7459.1724071776. The cubic root of 55639253 is about 381.7629373501.

The spelling of 55639253 in words is "fifty-five million, six hundred thirty-nine thousand, two hundred fifty-three".