25277216 has 36 divisors (see below), whose sum is σ = 51234498. Its totient is φ = 12275712.

The previous prime is 25277177. The next prime is 25277221. The reversal of 25277216 is 61277252.

It can be written as a sum of positive squares in 3 ways, for example, as 21196816 + 4080400 = 4604^2 + 2020^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43520 + ... + 44096.

Almost surely, 2^25277216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25277216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25617249).

25277216 is an abundant number, since it is smaller than the sum of its proper divisors (25957282).

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

25277216 is an equidigital number, since it uses as much as digits as its factorization.

25277216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661 (or 616 counting only the distinct ones).

The product of its digits is 11760, while the sum is 32.

The square root of 25277216 is about 5027.6451744331. The cubic root of 25277216 is about 293.4785827943.

The spelling of 25277216 in words is "twenty-five million, two hundred seventy-seven thousand, two hundred sixteen".