25213251115 has 12 divisors (see below), whose sum is σ = 32762308464. Its totient is φ = 18619015584.

The previous prime is 25213251113. The next prime is 25213251121. The reversal of 25213251115 is 51115231252.

It is a happy number.

It is not a de Polignac number, because 25213251115 - 2¹ = 25213251113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25213251113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14918239 + ... + 14919928.

It is an arithmetic number, because the mean of its divisors is an integer number (2730192372).

Almost surely, 2^25213251115 is an apocalyptic number.

25213251115 is a deficient number, since it is larger than the sum of its proper divisors (7549057349).

25213251115 is a wasteful number, since it uses less digits than its factorization.

25213251115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29838198 (or 29838185 counting only the distinct ones).

The product of its digits is 3000, while the sum is 28.

Adding to 25213251115 its reverse (51115231252), we get a palindrome (76328482367).

The spelling of 25213251115 in words is "twenty-five billion, two hundred thirteen million, two hundred fifty-one thousand, one hundred fifteen".