25243412522 has 4 divisors (see below), whose sum is σ = 37865118786. Its totient is φ = 12621706260.

The previous prime is 25243412459. The next prime is 25243412527. The reversal of 25243412522 is 22521434252.

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., 19243515841 + 5999896681 = 138721^2 + 77459^2 .

It is not an unprimeable number, because it can be changed into a prime (25243412527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6310853129 + ... + 6310853132.

Almost surely, 2^25243412522 is an apocalyptic number.

25243412522 is a deficient number, since it is larger than the sum of its proper divisors (12621706264).

25243412522 is a wasteful number, since it uses less digits than its factorization.

25243412522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12621706263.

The product of its digits is 38400, while the sum is 32.

Adding to 25243412522 its reverse (22521434252), we get a palindrome (47764846774).

The spelling of 25243412522 in words is "twenty-five billion, two hundred forty-three million, four hundred twelve thousand, five hundred twenty-two".