25243133215 has 4 divisors (see below), whose sum is σ = 30291759864. Its totient is φ = 20194506568.

The previous prime is 25243133197. The next prime is 25243133219. The reversal of 25243133215 is 51233134252.

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

It is a cyclic number.

It is not a de Polignac number, because 25243133215 - 2⁷ = 25243133087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25243133219) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2524313317 + ... + 2524313326.

It is an arithmetic number, because the mean of its divisors is an integer number (7572939966).

Almost surely, 2^25243133215 is an apocalyptic number.

25243133215 is a deficient number, since it is larger than the sum of its proper divisors (5048626649).

25243133215 is an equidigital number, since it uses as much as digits as its factorization.

25243133215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5048626648.

The product of its digits is 21600, while the sum is 31.

Adding to 25243133215 its reverse (51233134252), we get a palindrome (76476267467).

The spelling of 25243133215 in words is "twenty-five billion, two hundred forty-three million, one hundred thirty-three thousand, two hundred fifteen".