253131420 has 24 divisors (see below), whose sum is σ = 708768144. Its totient is φ = 67501696.

The previous prime is 253131409. The next prime is 253131443. The reversal of 253131420 is 24131352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2109369 + ... + 2109488.

It is an arithmetic number, because the mean of its divisors is an integer number (29532006).

Almost surely, 2^253131420 is an apocalyptic number.

253131420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253131420 is an abundant number, since it is smaller than the sum of its proper divisors (455636724).

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

253131420 is a wasteful number, since it uses less digits than its factorization.

253131420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218869 (or 4218867 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 253131420 is about 15910.1043365529. The cubic root of 253131420 is about 632.5798469190.

Adding to 253131420 its reverse (24131352), we get a palindrome (277262772).

The spelling of 253131420 in words is "two hundred fifty-three million, one hundred thirty-one thousand, four hundred twenty".