5256503221 has 4 divisors (see below), whose sum is σ = 5256955872. Its totient is φ = 5256050572.

The previous prime is 5256503117. The next prime is 5256503227. The reversal of 5256503221 is 1223056525.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5256503221 is a prime.

It is a super-2 number, since 2×5256503221² = 55261652224766749682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5256503227) 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, 208435 + ... + 232288.

It is an arithmetic number, because the mean of its divisors is an integer number (1314238968).

Almost surely, 2^5256503221 is an apocalyptic number.

It is an amenable number.

5256503221 is a deficient number, since it is larger than the sum of its proper divisors (452651).

5256503221 is a wasteful number, since it uses less digits than its factorization.

5256503221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452650.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 5256503221 is about 72501.7463306919. The cubic root of 5256503221 is about 1738.7306571121.

Adding to 5256503221 its reverse (1223056525), we get a palindrome (6479559746).

The spelling of 5256503221 in words is "five billion, two hundred fifty-six million, five hundred three thousand, two hundred twenty-one".