25571315 has 32 divisors (see below), whose sum is σ = 40518144. Its totient is φ = 14999040.

The previous prime is 25571309. The next prime is 25571317. The reversal of 25571315 is 51317552.

It is a happy number.

It is not a de Polignac number, because 25571315 - 2⁸ = 25571059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25571317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4592 + ... + 8498.

It is an arithmetic number, because the mean of its divisors is an integer number (1266192).

Almost surely, 2^25571315 is an apocalyptic number.

25571315 is a deficient number, since it is larger than the sum of its proper divisors (14946829).

25571315 is a wasteful number, since it uses less digits than its factorization.

25571315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947.

The product of its digits is 5250, while the sum is 29.

The square root of 25571315 is about 5056.8087762936. The cubic root of 25571315 is about 294.6123991219.

Adding to 25571315 its reverse (51317552), we get a palindrome (76888867).

The spelling of 25571315 in words is "twenty-five million, five hundred seventy-one thousand, three hundred fifteen".