55398229 has 2 divisors, whose sum is σ = 55398230. Its totient is φ = 55398228.

The previous prime is 55398221. The next prime is 55398263. The reversal of 55398229 is 92289355.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48972004 + 6426225 = 6998^2 + 2535^2 .

It is a cyclic number.

It is not a de Polignac number, because 55398229 - 2³ = 55398221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55398221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27699114 + 27699115.

It is an arithmetic number, because the mean of its divisors is an integer number (27699115).

Almost surely, 2^55398229 is an apocalyptic number.

It is an amenable number.

55398229 is a deficient number, since it is larger than the sum of its proper divisors (1).

55398229 is an equidigital number, since it uses as much as digits as its factorization.

55398229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 43.

The square root of 55398229 is about 7442.9986564556. The cubic root of 55398229 is about 381.2108857480.

The spelling of 55398229 in words is "fifty-five million, three hundred ninety-eight thousand, two hundred twenty-nine".