25003220 has 48 divisors (see below), whose sum is σ = 59270400. Its totient is φ = 8776320.

The previous prime is 25003217. The next prime is 25003247. The reversal of 25003220 is 2230052.

It is a super-2 number, since 2×25003220² = 1250322020736800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25003195 and 25003204.

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 15 ways as a sum of consecutive naturals, for example, 4421 + ... + 8339.

It is an arithmetic number, because the mean of its divisors is an integer number (1234800).

Almost surely, 2^25003220 is an apocalyptic number.

25003220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25003220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29635200).

25003220 is an abundant number, since it is smaller than the sum of its proper divisors (34267180).

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

25003220 is a wasteful number, since it uses less digits than its factorization.

25003220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968 (or 3966 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 25003220 is about 5000.3219896323. The cubic root of 25003220 is about 292.4143270652.

Adding to 25003220 its reverse (2230052), we get a palindrome (27233272).

It can be divided in two parts, 250032 and 20, that added together give a palindrome (250052).

The spelling of 25003220 in words is "twenty-five million, three thousand, two hundred twenty".