201157065 has 24 divisors (see below), whose sum is σ = 350612808. Its totient is φ = 106686720.

The previous prime is 201157051. The next prime is 201157069. The reversal of 201157065 is 560751102.

201157065 is a `hidden beast` number, since 20 + 11 + 570 + 65 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12616704 + 188540361 = 3552^2 + 13731^2 .

It is not a de Polignac number, because 201157065 - 2⁶ = 201157001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201157069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4204 + ... + 20493.

It is an arithmetic number, because the mean of its divisors is an integer number (14608867).

Almost surely, 2^201157065 is an apocalyptic number.

It is an amenable number.

201157065 is a deficient number, since it is larger than the sum of its proper divisors (149455743).

201157065 is a wasteful number, since it uses less digits than its factorization.

201157065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24889 (or 24886 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 201157065 is about 14182.9850525198. The cubic root of 201157065 is about 585.9291393154.

The spelling of 201157065 in words is "two hundred one million, one hundred fifty-seven thousand, sixty-five".