55238291 has 2 divisors, whose sum is σ = 55238292. Its totient is φ = 55238290.

The previous prime is 55238279. The next prime is 55238327. The reversal of 55238291 is 19283255.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55238291 - 2²² = 51043987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55238231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27619145 + 27619146.

It is an arithmetic number, because the mean of its divisors is an integer number (27619146).

Almost surely, 2^55238291 is an apocalyptic number.

55238291 is a deficient number, since it is larger than the sum of its proper divisors (1).

55238291 is an equidigital number, since it uses as much as digits as its factorization.

55238291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 35.

The square root of 55238291 is about 7432.2466993501. The cubic root of 55238291 is about 380.8436725909.

The spelling of 55238291 in words is "fifty-five million, two hundred thirty-eight thousand, two hundred ninety-one".