25881530 has 16 divisors (see below), whose sum is σ = 47377440. Its totient is φ = 10176912.

The previous prime is 25881523. The next prime is 25881533. The reversal of 25881530 is 3518852.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25881533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21344 + ... + 22523.

It is an arithmetic number, because the mean of its divisors is an integer number (2961090).

Almost surely, 2^25881530 is an apocalyptic number.

25881530 is a deficient number, since it is larger than the sum of its proper divisors (21495910).

25881530 is a wasteful number, since it uses less digits than its factorization.

25881530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43933.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 25881530 is about 5087.3893108352. The cubic root of 25881530 is about 295.7989641132.

The spelling of 25881530 in words is "twenty-five million, eight hundred eighty-one thousand, five hundred thirty".