253531334040 has 128 divisors (see below), whose sum is σ = 801081653760. Its totient is φ = 64064405504.

The previous prime is 253531334027. The next prime is 253531334051. The reversal of 253531334040 is 40433135352.

It is a junction number, because it is equal to n+sod(n) for n = 253531333992 and 253531334010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133929 + ... + 724568.

It is an arithmetic number, because the mean of its divisors is an integer number (6258450420).

Almost surely, 2^253531334040 is an apocalyptic number.

253531334040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253531334040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400540826880).

253531334040 is an abundant number, since it is smaller than the sum of its proper divisors (547550319720).

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

253531334040 is a wasteful number, since it uses less digits than its factorization.

253531334040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858641 (or 858637 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 33.

Adding to 253531334040 its reverse (40433135352), we get a palindrome (293964469392).

The spelling of 253531334040 in words is "two hundred fifty-three billion, five hundred thirty-one million, three hundred thirty-four thousand, forty".