25223113021 has 4 divisors (see below), whose sum is σ = 25483145212. Its totient is φ = 24963080832.

The previous prime is 25223113007. The next prime is 25223113031. The reversal of 25223113021 is 12031132252.

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 7377092100 + 17846020921 = 85890^2 + 133589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25223113021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25223112983 and 25223113001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25223113031) 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, 130015950 + ... + 130016143.

It is an arithmetic number, because the mean of its divisors is an integer number (6370786303).

Almost surely, 2^25223113021 is an apocalyptic number.

It is an amenable number.

25223113021 is a deficient number, since it is larger than the sum of its proper divisors (260032191).

25223113021 is an equidigital number, since it uses as much as digits as its factorization.

25223113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260032190.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 25223113021 its reverse (12031132252), we get a palindrome (37254245273).

The spelling of 25223113021 in words is "twenty-five billion, two hundred twenty-three million, one hundred thirteen thousand, twenty-one".