253210642340 has 96 divisors (see below), whose sum is σ = 553361155200. Its totient is φ = 97209728000.

The previous prime is 253210642337. The next prime is 253210642361. The reversal of 253210642340 is 43246012352.

It is a junction number, because it is equal to n+sod(n) for n = 253210642297 and 253210642306.

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, 89821451 + ... + 89824269.

It is an arithmetic number, because the mean of its divisors is an integer number (5764178700).

Almost surely, 2^253210642340 is an apocalyptic number.

253210642340 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 253210642340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276680577600).

253210642340 is an abundant number, since it is smaller than the sum of its proper divisors (300150512860).

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

253210642340 is a wasteful number, since it uses less digits than its factorization.

253210642340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3725 (or 3723 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 253210642340 its reverse (43246012352), we get a palindrome (296456654692).

The spelling of 253210642340 in words is "two hundred fifty-three billion, two hundred ten million, six hundred forty-two thousand, three hundred forty".