25218045 has 24 divisors (see below), whose sum is σ = 43828512. Its totient is φ = 13413600.

The previous prime is 25218041. The next prime is 25218077. The reversal of 25218045 is 54081252.

It is a happy number.

It is not a de Polignac number, because 25218045 - 2² = 25218041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25218041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30690 + ... + 31500.

It is an arithmetic number, because the mean of its divisors is an integer number (1826188).

Almost surely, 2^25218045 is an apocalyptic number.

It is an amenable number.

25218045 is a deficient number, since it is larger than the sum of its proper divisors (18610467).

25218045 is a wasteful number, since it uses less digits than its factorization.

25218045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513 (or 1510 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 25218045 is about 5021.7571625876. The cubic root of 25218045 is about 293.2494042195.

Adding to 25218045 its reverse (54081252), we get a palindrome (79299297).

The spelling of 25218045 in words is "twenty-five million, two hundred eighteen thousand, forty-five".