25218235 has 16 divisors (see below), whose sum is σ = 36089856. Its totient is φ = 16540128.

The previous prime is 25218233. The next prime is 25218269. The reversal of 25218235 is 53281252.

It is not a de Polignac number, because 25218235 - 2¹ = 25218233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25218233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14859 + ... + 16468.

It is an arithmetic number, because the mean of its divisors is an integer number (2255616).

Almost surely, 2^25218235 is an apocalyptic number.

25218235 is a deficient number, since it is larger than the sum of its proper divisors (10871621).

25218235 is a wasteful number, since it uses less digits than its factorization.

25218235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31362.

The product of its digits is 4800, while the sum is 28.

The square root of 25218235 is about 5021.7760802330. The cubic root of 25218235 is about 293.2501406928.

Adding to 25218235 its reverse (53281252), we get a palindrome (78499487).

The spelling of 25218235 in words is "twenty-five million, two hundred eighteen thousand, two hundred thirty-five".