201100225 has 24 divisors (see below), whose sum is σ = 268395768. Its totient is φ = 148915200.

The previous prime is 201100213. The next prime is 201100253. The reversal of 201100225 is 522001102.

It can be written as a sum of positive squares in 12 ways, for example, as 48553024 + 152547201 = 6968^2 + 12351^2 .

It is not a de Polignac number, because 201100225 - 2⁹ = 201099713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22047 + ... + 29803.

It is an arithmetic number, because the mean of its divisors is an integer number (11183157).

Almost surely, 2^201100225 is an apocalyptic number.

201100225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

201100225 is a deficient number, since it is larger than the sum of its proper divisors (67295543).

201100225 is a wasteful number, since it uses less digits than its factorization.

201100225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7845 (or 7840 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 201100225 is about 14180.9811014612. The cubic root of 201100225 is about 585.8739463751.

Adding to 201100225 its reverse (522001102), we get a palindrome (723101327).

The spelling of 201100225 in words is "two hundred one million, one hundred thousand, two hundred twenty-five".