25481218 has 8 divisors (see below), whose sum is σ = 43682112. Its totient is φ = 10920516.

The previous prime is 25481207. The next prime is 25481219. The reversal of 25481218 is 81218452.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25481218.

It is not an unprimeable number, because it can be changed into a prime (25481219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 910030 + ... + 910057.

It is an arithmetic number, because the mean of its divisors is an integer number (5460264).

Almost surely, 2^25481218 is an apocalyptic number.

25481218 is a deficient number, since it is larger than the sum of its proper divisors (18200894).

25481218 is a wasteful number, since it uses less digits than its factorization.

25481218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820096.

The product of its digits is 5120, while the sum is 31.

The square root of 25481218 is about 5047.8924315005. The cubic root of 25481218 is about 294.2659832410.

The spelling of 25481218 in words is "twenty-five million, four hundred eighty-one thousand, two hundred eighteen".