253114640 has 20 divisors (see below), whose sum is σ = 588491724. Its totient is φ = 101245824.

The previous prime is 253114633. The next prime is 253114643. The reversal of 253114640 is 46411352.

It can be written as a sum of positive squares in 2 ways, for example, as 94556176 + 158558464 = 9724^2 + 12592^2 .

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

It is not an unprimeable number, because it can be changed into a prime (253114643) 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, 1581887 + ... + 1582046.

Almost surely, 2^253114640 is an apocalyptic number.

253114640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253114640 is an abundant number, since it is smaller than the sum of its proper divisors (335377084).

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

253114640 is a wasteful number, since it uses less digits than its factorization.

253114640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3163946 (or 3163940 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 253114640 is about 15909.5769899768. The cubic root of 253114640 is about 632.5658687722.

Adding to 253114640 its reverse (46411352), we get a palindrome (299525992).

It can be divided in two parts, 2531 and 14640, that added together give a palindrome (17171).

The spelling of 253114640 in words is "two hundred fifty-three million, one hundred fourteen thousand, six hundred forty".