55222229 has 2 divisors, whose sum is σ = 55222230. Its totient is φ = 55222228.

The previous prime is 55222207. The next prime is 55222243. The reversal of 55222229 is 92222255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41899729 + 13322500 = 6473^2 + 3650^2 .

It is a cyclic number.

It is not a de Polignac number, because 55222229 - 2⁸ = 55221973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55422229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27611114 + 27611115.

It is an arithmetic number, because the mean of its divisors is an integer number (27611115).

Almost surely, 2^55222229 is an apocalyptic number.

It is an amenable number.

55222229 is a deficient number, since it is larger than the sum of its proper divisors (1).

55222229 is an equidigital number, since it uses as much as digits as its factorization.

55222229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 29.

The square root of 55222229 is about 7431.1660592400. The cubic root of 55222229 is about 380.8067555420.

The spelling of 55222229 in words is "fifty-five million, two hundred twenty-two thousand, two hundred twenty-nine".