55233229 has 2 divisors, whose sum is σ = 55233230. Its totient is φ = 55233228.

The previous prime is 55233181. The next prime is 55233239. The reversal of 55233229 is 92233255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55160329 + 72900 = 7427^2 + 270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55233229 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55233229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55233239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27616614 + 27616615.

It is an arithmetic number, because the mean of its divisors is an integer number (27616615).

Almost surely, 2^55233229 is an apocalyptic number.

It is an amenable number.

55233229 is a deficient number, since it is larger than the sum of its proper divisors (1).

55233229 is an equidigital number, since it uses as much as digits as its factorization.

55233229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 31.

The square root of 55233229 is about 7431.9061484925. The cubic root of 55233229 is about 380.8320388158.

The spelling of 55233229 in words is "fifty-five million, two hundred thirty-three thousand, two hundred twenty-nine".