253566 has 12 divisors (see below), whose sum is σ = 549432. Its totient is φ = 84516.

The previous prime is 253553. The next prime is 253567. The reversal of 253566 is 665352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253567) by changing a digit.

253566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7026 + ... + 7061.

It is an arithmetic number, because the mean of its divisors is an integer number (45786).

2²⁵³⁵⁶⁶ is an apocalyptic number.

253566 is an abundant number, since it is smaller than the sum of its proper divisors (295866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253566 is a wasteful number, since it uses less digits than its factorization.

253566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14095 (or 14092 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 253566 is about 503.5533735365. The cubic root of 253566 is about 63.2941647624.

It can be divided in two parts, 2535 and 66, that added together give a square (2601 = 51²).

The spelling of 253566 in words is "two hundred fifty-three thousand, five hundred sixty-six".