53665223 has 2 divisors, whose sum is σ = 53665224. Its totient is φ = 53665222.

The previous prime is 53665219. The next prime is 53665237. The reversal of 53665223 is 32256635.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53665223 - 2² = 53665219 is a prime.

It is a super-3 number, since 3×53665223³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53665223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53665523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26832611 + 26832612.

It is an arithmetic number, because the mean of its divisors is an integer number (26832612).

Almost surely, 2^53665223 is an apocalyptic number.

53665223 is a deficient number, since it is larger than the sum of its proper divisors (1).

53665223 is an equidigital number, since it uses as much as digits as its factorization.

53665223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 32.

The square root of 53665223 is about 7325.6551242875. The cubic root of 53665223 is about 377.1935978412.

It can be divided in two parts, 536652 and 23, that multiplied together give a triangular number (12342996 = T₄₉₆₈).

The spelling of 53665223 in words is "fifty-three million, six hundred sixty-five thousand, two hundred twenty-three".