55665223 has 2 divisors, whose sum is σ = 55665224. Its totient is φ = 55665222.

The previous prime is 55665187. The next prime is 55665277. The reversal of 55665223 is 32256655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55665223 - 2²⁵ = 22110791 is a prime.

It is a super-3 number, since 3×55665223³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55665523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27832611 + 27832612.

It is an arithmetic number, because the mean of its divisors is an integer number (27832612).

Almost surely, 2^55665223 is an apocalyptic number.

55665223 is a deficient number, since it is larger than the sum of its proper divisors (1).

55665223 is an equidigital number, since it uses as much as digits as its factorization.

55665223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 34.

The square root of 55665223 is about 7460.9130138342. The cubic root of 55665223 is about 381.8223249276.

The spelling of 55665223 in words is "fifty-five million, six hundred sixty-five thousand, two hundred twenty-three".