25216242 has 16 divisors (see below), whose sum is σ = 50588832. Its totient is φ = 8379360.

The previous prime is 25216229. The next prime is 25216273. The reversal of 25216242 is 24261252.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4363 + ... + 8334.

It is an arithmetic number, because the mean of its divisors is an integer number (3161802).

Almost surely, 2^25216242 is an apocalyptic number.

25216242 is an abundant number, since it is smaller than the sum of its proper divisors (25372590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25216242 is a wasteful number, since it uses less digits than its factorization.

25216242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13033.

The product of its digits is 1920, while the sum is 24.

The square root of 25216242 is about 5021.5776405429. The cubic root of 25216242 is about 293.2424152918.

Adding to 25216242 its reverse (24261252), we get a palindrome (49477494).

The spelling of 25216242 in words is "twenty-five million, two hundred sixteen thousand, two hundred forty-two".