25216747 has 4 divisors (see below), whose sum is σ = 26086320. Its totient is φ = 24347176.

The previous prime is 25216727. The next prime is 25216753. The reversal of 25216747 is 74761252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25216747 - 2¹¹ = 25214699 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25216727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434743 + ... + 434800.

It is an arithmetic number, because the mean of its divisors is an integer number (6521580).

Almost surely, 2^25216747 is an apocalyptic number.

25216747 is a deficient number, since it is larger than the sum of its proper divisors (869573).

25216747 is an equidigital number, since it uses as much as digits as its factorization.

25216747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869572.

The product of its digits is 23520, while the sum is 34.

The square root of 25216747 is about 5021.6279232934. The cubic root of 25216747 is about 293.2443728454.

Adding to 25216747 its reverse (74761252), we get a palindrome (99977999).

The spelling of 25216747 in words is "twenty-five million, two hundred sixteen thousand, seven hundred forty-seven".