252113242445 has 4 divisors (see below), whose sum is σ = 302535890940. Its totient is φ = 201690593952.

The previous prime is 252113242387. The next prime is 252113242487. The reversal of 252113242445 is 544242311252.

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 166871433001 + 85241809444 = 408499^2 + 291962^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252113242445 is a prime.

It is a super-2 number, since 2×252113242445² (a number of 24 digits) contains 22 as substring.

It is a congruent 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, 25211324240 + ... + 25211324249.

It is an arithmetic number, because the mean of its divisors is an integer number (75633972735).

Almost surely, 2^252113242445 is an apocalyptic number.

It is an amenable number.

252113242445 is a deficient number, since it is larger than the sum of its proper divisors (50422648495).

252113242445 is an equidigital number, since it uses as much as digits as its factorization.

252113242445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50422648494.

The product of its digits is 76800, while the sum is 35.

Adding to 252113242445 its reverse (544242311252), we get a palindrome (796355553697).

The spelling of 252113242445 in words is "two hundred fifty-two billion, one hundred thirteen million, two hundred forty-two thousand, four hundred forty-five".