201165870 has 32 divisors (see below), whose sum is σ = 483637248. Its totient is φ = 53551008.

The previous prime is 201165829. The next prime is 201165871. The reversal of 201165870 is 78561102.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201165871) 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 15 ways as a sum of consecutive naturals, for example, 12687 + ... + 23733.

It is an arithmetic number, because the mean of its divisors is an integer number (15113664).

Almost surely, 2^201165870 is an apocalyptic number.

201165870 is an abundant number, since it is smaller than the sum of its proper divisors (282471378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201165870 is a wasteful number, since it uses less digits than its factorization.

201165870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11664.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 201165870 is about 14183.2954562753. The cubic root of 201165870 is about 585.9376882417.

The spelling of 201165870 in words is "two hundred one million, one hundred sixty-five thousand, eight hundred seventy".