25222780 has 24 divisors (see below), whose sum is σ = 57783600. Its totient is φ = 9171840.

The previous prime is 25222777. The next prime is 25222793. The reversal of 25222780 is 8722252.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57105 + ... + 57544.

It is an arithmetic number, because the mean of its divisors is an integer number (2407650).

Almost surely, 2^25222780 is an apocalyptic number.

25222780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25222780 is an abundant number, since it is smaller than the sum of its proper divisors (32560820).

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

25222780 is a wasteful number, since it uses less digits than its factorization.

25222780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114669 (or 114667 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 25222780 is about 5022.2285889832. The cubic root of 25222780 is about 293.2677568057.

It can be divided in two parts, 252 and 22780, that added together give a palindrome (23032).

The spelling of 25222780 in words is "twenty-five million, two hundred twenty-two thousand, seven hundred eighty".