253321321523 has 8 divisors (see below), whose sum is σ = 272862237696. Its totient is φ = 234490984200.

The previous prime is 253321321471. The next prime is 253321321529. The reversal of 253321321523 is 325123123352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253321321523 - 2²⁴ = 253304544307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 253321321523.

It is not an unprimeable number, because it can be changed into a prime (253321321529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177643973 + ... + 177645398.

It is an arithmetic number, because the mean of its divisors is an integer number (34107779712).

Almost surely, 2^253321321523 is an apocalyptic number.

253321321523 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

253321321523 is a deficient number, since it is larger than the sum of its proper divisors (19540916173).

253321321523 is a wasteful number, since it uses less digits than its factorization.

253321321523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355289425.

The product of its digits is 32400, while the sum is 32.

Adding to 253321321523 its reverse (325123123352), we get a palindrome (578444444875).

The spelling of 253321321523 in words is "two hundred fifty-three billion, three hundred twenty-one million, three hundred twenty-one thousand, five hundred twenty-three".