25208230442 has 4 divisors (see below), whose sum is σ = 37812345666. Its totient is φ = 12604115220.

The previous prime is 25208230433. The next prime is 25208230459. The reversal of 25208230442 is 24403280252.

It is a Cunningham number, because it is equal to 158771²+1.

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

It can be written as a sum of positive squares in only one way, i.e., 25208230441 + 1 = 158771^2 + 1^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25208230399 and 25208230408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6302057609 + ... + 6302057612.

Almost surely, 2^25208230442 is an apocalyptic number.

25208230442 is a deficient number, since it is larger than the sum of its proper divisors (12604115224).

25208230442 is a wasteful number, since it uses less digits than its factorization.

25208230442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12604115223.

The product of its (nonzero) digits is 30720, while the sum is 32.

The spelling of 25208230442 in words is "twenty-five billion, two hundred eight million, two hundred thirty thousand, four hundred forty-two".