55222669 has 2 divisors, whose sum is σ = 55222670. Its totient is φ = 55222668.

The previous prime is 55222649. The next prime is 55222691. The reversal of 55222669 is 96622255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31505769 + 23716900 = 5613^2 + 4870^2 .

It is a cyclic number.

It is not a de Polignac number, because 55222669 - 2⁵ = 55222637 is a prime.

It is a super-2 number, since 2×55222669² = 6099086342967122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55222649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27611334 + 27611335.

It is an arithmetic number, because the mean of its divisors is an integer number (27611335).

Almost surely, 2^55222669 is an apocalyptic number.

It is an amenable number.

55222669 is a deficient number, since it is larger than the sum of its proper divisors (1).

55222669 is an equidigital number, since it uses as much as digits as its factorization.

55222669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

The square root of 55222669 is about 7431.1956642252. The cubic root of 55222669 is about 380.8077669374.

The spelling of 55222669 in words is "fifty-five million, two hundred twenty-two thousand, six hundred sixty-nine".