25216651 has 4 divisors (see below), whose sum is σ = 25322400. Its totient is φ = 25110904.

The previous prime is 25216613. The next prime is 25216657. The reversal of 25216651 is 15661252.

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 25216651 - 2¹⁵ = 25183883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25216657) 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, 52516 + ... + 52993.

It is an arithmetic number, because the mean of its divisors is an integer number (6330600).

Almost surely, 2^25216651 is an apocalyptic number.

25216651 is a deficient number, since it is larger than the sum of its proper divisors (105749).

25216651 is a wasteful number, since it uses less digits than its factorization.

25216651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105748.

The product of its digits is 3600, while the sum is 28.

The square root of 25216651 is about 5021.6183646311. The cubic root of 25216651 is about 293.2440007184.

The spelling of 25216651 in words is "twenty-five million, two hundred sixteen thousand, six hundred fifty-one".