253520423303430 has 32 divisors (see below), whose sum is σ = 608470985970144. Its totient is φ = 67603005098496.

The previous prime is 253520423303383. The next prime is 253520423303467. The reversal of 253520423303430 is 34303324025352.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151724977 + ... + 153386796.

It is an arithmetic number, because the mean of its divisors is an integer number (19014718311567).

Almost surely, 2^{253520423303430} is an apocalyptic number.

253520423303430 is an abundant number, since it is smaller than the sum of its proper divisors (354950562666714).

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

253520423303430 is a wasteful number, since it uses less digits than its factorization.

253520423303430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305139480.

The product of its (nonzero) digits is 777600, while the sum is 39.

Adding to 253520423303430 its reverse (34303324025352), we get a palindrome (287823747328782).

The spelling of 253520423303430 in words is "two hundred fifty-three trillion, five hundred twenty billion, four hundred twenty-three million, three hundred three thousand, four hundred thirty".