253421525345 has 4 divisors (see below), whose sum is σ = 304105830420. Its totient is φ = 202737220272.

The previous prime is 253421525339. The next prime is 253421525363. The reversal of 253421525345 is 543525124352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134876969536 + 118544555809 = 367256^2 + 344303^2 .

It is a cyclic number.

It is not a de Polignac number, because 253421525345 - 2⁸ = 253421525089 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25342152530 + ... + 25342152539.

It is an arithmetic number, because the mean of its divisors is an integer number (76026457605).

Almost surely, 2^253421525345 is an apocalyptic number.

It is an amenable number.

253421525345 is a deficient number, since it is larger than the sum of its proper divisors (50684305075).

253421525345 is an equidigital number, since it uses as much as digits as its factorization.

253421525345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50684305074.

The product of its digits is 720000, while the sum is 41.

Adding to 253421525345 its reverse (543525124352), we get a palindrome (796946649697).

The spelling of 253421525345 in words is "two hundred fifty-three billion, four hundred twenty-one million, five hundred twenty-five thousand, three hundred forty-five".