201312225 has 18 divisors (see below), whose sum is σ = 360572966. Its totient is φ = 107366400.

The previous prime is 201312217. The next prime is 201312257. The reversal of 201312225 is 522213102.

It can be written as a sum of positive squares in 3 ways, for example, as 9960336 + 191351889 = 3156^2 + 13833^2 .

It is not a de Polignac number, because 201312225 - 2³ = 201312217 is a prime.

It is a super-2 number, since 2×201312225² = 81053223868901250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201312198 and 201312207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 447136 + ... + 447585.

Almost surely, 2^201312225 is an apocalyptic number.

201312225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

201312225 is a deficient number, since it is larger than the sum of its proper divisors (159260741).

201312225 is a wasteful number, since it uses less digits than its factorization.

201312225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894737 (or 894729 counting only the distinct ones).

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

The square root of 201312225 is about 14188.4539326877. The cubic root of 201312225 is about 586.0797503159.

Adding to 201312225 its reverse (522213102), we get a palindrome (723525327).

The spelling of 201312225 in words is "two hundred one million, three hundred twelve thousand, two hundred twenty-five".