201240655 has 16 divisors (see below), whose sum is σ = 301077504. Its totient is φ = 125448480.

The previous prime is 201240653. The next prime is 201240661. The reversal of 201240655 is 556042102.

It is not a de Polignac number, because 201240655 - 2¹ = 201240653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201240653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260967 + ... + 261736.

It is an arithmetic number, because the mean of its divisors is an integer number (18817344).

Almost surely, 2^201240655 is an apocalyptic number.

201240655 is a deficient number, since it is larger than the sum of its proper divisors (99836849).

201240655 is a wasteful number, since it uses less digits than its factorization.

201240655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522726.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 201240655 is about 14185.9315873157. The cubic root of 201240655 is about 586.0102882327.

Adding to 201240655 its reverse (556042102), we get a palindrome (757282757).

The spelling of 201240655 in words is "two hundred one million, two hundred forty thousand, six hundred fifty-five".