25106220 has 96 divisors (see below), whose sum is σ = 82252800. Its totient is φ = 6340032.

The previous prime is 25106203. The next prime is 25106231. The reversal of 25106220 is 2260152.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 25106193 and 25106202.

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, 9037 + ... + 11483.

It is an arithmetic number, because the mean of its divisors is an integer number (856800).

Almost surely, 2^25106220 is an apocalyptic number.

25106220 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 25106220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41126400).

25106220 is an abundant number, since it is smaller than the sum of its proper divisors (57146580).

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

25106220 is a wasteful number, since it uses less digits than its factorization.

25106220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484 (or 2476 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 25106220 is about 5010.6107412171. The cubic root of 25106220 is about 292.8153075845.

Adding to 25106220 its reverse (2260152), we get a palindrome (27366372).

The spelling of 25106220 in words is "twenty-five million, one hundred six thousand, two hundred twenty".