252742247251 has 4 divisors (see below), whose sum is σ = 272183958592. Its totient is φ = 233300535912.

The previous prime is 252742247213. The next prime is 252742247327. The reversal of 252742247251 is 152742247252.

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

It is a cyclic number.

It is not a de Polignac number, because 252742247251 - 2⁹ = 252742246739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 252742247198 and 252742247207.

It is not an unprimeable number, because it can be changed into a prime (252742247201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9720855651 + ... + 9720855676.

It is an arithmetic number, because the mean of its divisors is an integer number (68045989648).

Almost surely, 2^252742247251 is an apocalyptic number.

252742247251 is a deficient number, since it is larger than the sum of its proper divisors (19441711341).

252742247251 is a wasteful number, since it uses less digits than its factorization.

252742247251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19441711340.

The product of its digits is 627200, while the sum is 43.

Subtracting from 252742247251 its reverse (152742247252), we obtain a palindrome (99999999999).

The spelling of 252742247251 in words is "two hundred fifty-two billion, seven hundred forty-two million, two hundred forty-seven thousand, two hundred fifty-one".