201156243 has 8 divisors (see below), whose sum is σ = 268706256. Its totient is φ = 133855200.

The previous prime is 201156203. The next prime is 201156251. The reversal of 201156243 is 342651102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201156243 - 2¹⁷ = 201025171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201156203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60348 + ... + 63593.

It is an arithmetic number, because the mean of its divisors is an integer number (33588282).

Almost surely, 2^201156243 is an apocalyptic number.

201156243 is a deficient number, since it is larger than the sum of its proper divisors (67550013).

201156243 is a wasteful number, since it uses less digits than its factorization.

201156243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124485.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 201156243 is about 14182.9560741053. The cubic root of 201156243 is about 585.9283412087.

The spelling of 201156243 in words is "two hundred one million, one hundred fifty-six thousand, two hundred forty-three".