25222530 has 64 divisors (see below), whose sum is σ = 64263168. Its totient is φ = 6324480.

The previous prime is 25222529. The next prime is 25222573. The reversal of 25222530 is 3522252.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25222497 and 25222506.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34044 + ... + 34776.

It is an arithmetic number, because the mean of its divisors is an integer number (1004112).

Almost surely, 2^25222530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25222530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32131584).

25222530 is an abundant number, since it is smaller than the sum of its proper divisors (39040638).

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

25222530 is a wasteful number, since it uses less digits than its factorization.

25222530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 25222530 is about 5022.2036995725. The cubic root of 25222530 is about 293.2667878776.

Adding to 25222530 its reverse (3522252), we get a palindrome (28744782).

It can be divided in two parts, 25222 and 530, that added together give a palindrome (25752).

The spelling of 25222530 in words is "twenty-five million, two hundred twenty-two thousand, five hundred thirty".