25215132245 has 8 divisors (see below), whose sum is σ = 30260819160. Its totient is φ = 20170332160.

The previous prime is 25215132211. The next prime is 25215132259. The reversal of 25215132245 is 54223151252.

It can be written as a sum of positive squares in 4 ways, for example, as 8964491761 + 16250640484 = 94681^2 + 127478^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25215132245 - 2⁸ = 25215131989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157460 + ... + 274269.

It is an arithmetic number, because the mean of its divisors is an integer number (3782602395).

Almost surely, 2^25215132245 is an apocalyptic number.

It is an amenable number.

25215132245 is a deficient number, since it is larger than the sum of its proper divisors (5045686915).

25215132245 is a wasteful number, since it uses less digits than its factorization.

25215132245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443415.

The product of its digits is 24000, while the sum is 32.

Adding to 25215132245 its reverse (54223151252), we get a palindrome (79438283497).

The spelling of 25215132245 in words is "twenty-five billion, two hundred fifteen million, one hundred thirty-two thousand, two hundred forty-five".