55831229 has 2 divisors, whose sum is σ = 55831230. Its totient is φ = 55831228.

The previous prime is 55831183. The next prime is 55831267. The reversal of 55831229 is 92213855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51811204 + 4020025 = 7198^2 + 2005^2 .

It is a cyclic number.

It is not a de Polignac number, because 55831229 - 2¹⁶ = 55765693 is a prime.

It is a super-2 number, since 2×55831229² = 6234252263300882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55831129) 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, 27915614 + 27915615.

It is an arithmetic number, because the mean of its divisors is an integer number (27915615).

Almost surely, 2^55831229 is an apocalyptic number.

It is an amenable number.

55831229 is a deficient number, since it is larger than the sum of its proper divisors (1).

55831229 is an equidigital number, since it uses as much as digits as its factorization.

55831229 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 55831229 is about 7472.0297777779. The cubic root of 55831229 is about 382.2015077667.

The spelling of 55831229 in words is "fifty-five million, eight hundred thirty-one thousand, two hundred twenty-nine".