253103440 has 20 divisors (see below), whose sum is σ = 588465684. Its totient is φ = 101241344.

The previous prime is 253103423. The next prime is 253103443. The reversal of 253103440 is 44301352.

It can be written as a sum of positive squares in 2 ways, for example, as 55532304 + 197571136 = 7452^2 + 14056^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×253103440² = 128122702679667200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253103443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1581817 + ... + 1581976.

Almost surely, 2^253103440 is an apocalyptic number.

253103440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253103440 is an abundant number, since it is smaller than the sum of its proper divisors (335362244).

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

253103440 is a wasteful number, since it uses less digits than its factorization.

253103440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3163806 (or 3163800 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 253103440 is about 15909.2249968375. The cubic root of 253103440 is about 632.5565385570.

Adding to 253103440 its reverse (44301352), we get a palindrome (297404792).

The spelling of 253103440 in words is "two hundred fifty-three million, one hundred three thousand, four hundred forty".