253431020 has 24 divisors (see below), whose sum is σ = 555345504. Its totient is φ = 96964736.

The previous prime is 253431011. The next prime is 253431047. The reversal of 253431020 is 20134352.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 253430983 and 253431001.

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, 275009 + ... + 275928.

It is an arithmetic number, because the mean of its divisors is an integer number (23139396).

Almost surely, 2^253431020 is an apocalyptic number.

253431020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253431020 is an abundant number, since it is smaller than the sum of its proper divisors (301914484).

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

253431020 is a wasteful number, since it uses less digits than its factorization.

253431020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550969 (or 550967 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 253431020 is about 15919.5169524706. The cubic root of 253431020 is about 632.8293170697.

Adding to 253431020 its reverse (20134352), we get a palindrome (273565372).

The spelling of 253431020 in words is "two hundred fifty-three million, four hundred thirty-one thousand, twenty".