20100225 has 12 divisors (see below), whose sum is σ = 33232496. Its totient is φ = 10720080.

The previous prime is 20100217. The next prime is 20100251. The reversal of 20100225 is 52200102.

It is not a de Polignac number, because 20100225 - 2³ = 20100217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20100225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133927 + ... + 134076.

Almost surely, 2^20100225 is an apocalyptic number.

20100225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20100225 is a deficient number, since it is larger than the sum of its proper divisors (13132271).

20100225 is a wasteful number, since it uses less digits than its factorization.

20100225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268016 (or 268011 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 20100225 is about 4483.3274473319. The cubic root of 20100225 is about 271.8944272021.

Adding to 20100225 its reverse (52200102), we get a palindrome (72300327).

The spelling of 20100225 in words is "twenty million, one hundred thousand, two hundred twenty-five".