25005212522 has 4 divisors (see below), whose sum is σ = 37507818786. Its totient is φ = 12502606260.

The previous prime is 25005212497. The next prime is 25005212527. The reversal of 25005212522 is 22521250052.

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., 22368492721 + 2636719801 = 149561^2 + 51349^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25005212491 and 25005212500.

It is not an unprimeable number, because it can be changed into a prime (25005212527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6251303129 + ... + 6251303132.

Almost surely, 2^25005212522 is an apocalyptic number.

25005212522 is a deficient number, since it is larger than the sum of its proper divisors (12502606264).

25005212522 is a wasteful number, since it uses less digits than its factorization.

25005212522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12502606263.

The product of its (nonzero) digits is 4000, while the sum is 26.

Adding to 25005212522 its reverse (22521250052), we get a palindrome (47526462574).

The spelling of 25005212522 in words is "twenty-five billion, five million, two hundred twelve thousand, five hundred twenty-two".