25142218 has 16 divisors (see below), whose sum is σ = 40310784. Its totient is φ = 11719360.

The previous prime is 25142213. The next prime is 25142239. The reversal of 25142218 is 81224152.

It is a super-2 number, since 2×25142218² = 1264262251919048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25142192 and 25142201.

It is not an unprimeable number, because it can be changed into a prime (25142213) 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, 183 + ... + 7093.

It is an arithmetic number, because the mean of its divisors is an integer number (2519424).

Almost surely, 2^25142218 is an apocalyptic number.

25142218 is a deficient number, since it is larger than the sum of its proper divisors (15168566).

25142218 is a wasteful number, since it uses less digits than its factorization.

25142218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7037.

The product of its digits is 1280, while the sum is 25.

The square root of 25142218 is about 5014.2016313667. The cubic root of 25142218 is about 292.9551896745.

The spelling of 25142218 in words is "twenty-five million, one hundred forty-two thousand, two hundred eighteen".