253565240 has 32 divisors (see below), whose sum is σ = 574313760. Its totient is φ = 100752000.

The previous prime is 253565239. The next prime is 253565243. The reversal of 253565240 is 42565352.

253565240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 253565197 and 253565206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253565243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14951 + ... + 27030.

It is an arithmetic number, because the mean of its divisors is an integer number (17947305).

Almost surely, 2^253565240 is an apocalyptic number.

253565240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253565240 is an abundant number, since it is smaller than the sum of its proper divisors (320748520).

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

253565240 is a wasteful number, since it uses less digits than its factorization.

253565240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42143 (or 42139 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 253565240 is about 15923.7319746346. The cubic root of 253565240 is about 632.9410152622.

The spelling of 253565240 in words is "two hundred fifty-three million, five hundred sixty-five thousand, two hundred forty".