253022240 has 48 divisors (see below), whose sum is σ = 629233920. Its totient is φ = 95880960.

The previous prime is 253022239. The next prime is 253022249. The reversal of 253022240 is 42220352.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (253022249) 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, 38576 + ... + 44655.

It is an arithmetic number, because the mean of its divisors is an integer number (13109040).

Almost surely, 2^253022240 is an apocalyptic number.

253022240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253022240 is an abundant number, since it is smaller than the sum of its proper divisors (376211680).

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

253022240 is a wasteful number, since it uses less digits than its factorization.

253022240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83265 (or 83257 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 253022240 is about 15906.6728136339. The cubic root of 253022240 is about 632.4888862634.

Adding to 253022240 its reverse (42220352), we get a palindrome (295242592).

The spelling of 253022240 in words is "two hundred fifty-three million, twenty-two thousand, two hundred forty".