201015707 has 4 divisors (see below), whose sum is σ = 201148536. Its totient is φ = 200882880.

The previous prime is 201015673. The next prime is 201015739. The reversal of 201015707 is 707510102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201015707 - 2⁶ = 201015643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201015797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64118 + ... + 67179.

It is an arithmetic number, because the mean of its divisors is an integer number (50287134).

Almost surely, 2^201015707 is an apocalyptic number.

201015707 is a deficient number, since it is larger than the sum of its proper divisors (132829).

201015707 is a wasteful number, since it uses less digits than its factorization.

201015707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132828.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 201015707 is about 14178.0008111158. Note that the first 3 decimals coincide. The cubic root of 201015707 is about 585.7918582309.

Subtracting from 201015707 its sum of digits (23), we obtain a square (201015684 = 14178²).

Adding to 201015707 its reverse (707510102), we get a palindrome (908525809).

The spelling of 201015707 in words is "two hundred one million, fifteen thousand, seven hundred seven".