25421445233 has 4 divisors (see below), whose sum is σ = 25482117360. Its totient is φ = 25360773108.

The previous prime is 25421445229. The next prime is 25421445239. The reversal of 25421445233 is 33254412452.

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 not a de Polignac number, because 25421445233 - 2² = 25421445229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25421445193 and 25421445202.

It is not an unprimeable number, because it can be changed into a prime (25421445239) 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, 30335435 + ... + 30336272.

It is an arithmetic number, because the mean of its divisors is an integer number (6370529340).

Almost surely, 2^25421445233 is an apocalyptic number.

It is an amenable number.

25421445233 is a deficient number, since it is larger than the sum of its proper divisors (60672127).

25421445233 is an equidigital number, since it uses as much as digits as its factorization.

25421445233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60672126.

The product of its digits is 115200, while the sum is 35.

Adding to 25421445233 its reverse (33254412452), we get a palindrome (58675857685).

The spelling of 25421445233 in words is "twenty-five billion, four hundred twenty-one million, four hundred forty-five thousand, two hundred thirty-three".