253565406 has 24 divisors (see below), whose sum is σ = 553722624. Its totient is φ = 83855520.

The previous prime is 253565383. The next prime is 253565419. The reversal of 253565406 is 604565352.

It is a happy number.

253565406 is a `hidden beast` number, since 2 + 53 + 565 + 40 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53175 + ... + 57746.

It is an arithmetic number, because the mean of its divisors is an integer number (23071776).

Almost surely, 2^253565406 is an apocalyptic number.

253565406 is an abundant number, since it is smaller than the sum of its proper divisors (300157218).

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

253565406 is a wasteful number, since it uses less digits than its factorization.

253565406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111056 (or 111053 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 253565406 is about 15923.7371869797. The cubic root of 253565406 is about 632.9411533834.

The spelling of 253565406 in words is "two hundred fifty-three million, five hundred sixty-five thousand, four hundred six".