55177229 has 2 divisors, whose sum is σ = 55177230. Its totient is φ = 55177228.

The previous prime is 55177193. The next prime is 55177231. The reversal of 55177229 is 92277155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55160329 + 16900 = 7427^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 55177229 - 2¹² = 55173133 is a prime.

Together with 55177231, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55177192 and 55177201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55177289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27588614 + 27588615.

It is an arithmetic number, because the mean of its divisors is an integer number (27588615).

Almost surely, 2^55177229 is an apocalyptic number.

It is an amenable number.

55177229 is a deficient number, since it is larger than the sum of its proper divisors (1).

55177229 is an equidigital number, since it uses as much as digits as its factorization.

55177229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44100, while the sum is 38.

The square root of 55177229 is about 7428.1376535441. The cubic root of 55177229 is about 380.7032889903.

The spelling of 55177229 in words is "fifty-five million, one hundred seventy-seven thousand, two hundred twenty-nine".