200161491 has 8 divisors (see below), whose sum is σ = 266956800. Its totient is φ = 133403592.

The previous prime is 200161477. The next prime is 200161499. The reversal of 200161491 is 194161002.

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

It is not a de Polignac number, because 200161491 - 2⁹ = 200160979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (200161499) 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 7 ways as a sum of consecutive naturals, for example, 7446 + ... + 21348.

It is an arithmetic number, because the mean of its divisors is an integer number (33369600).

Almost surely, 2^200161491 is an apocalyptic number.

200161491 is a deficient number, since it is larger than the sum of its proper divisors (66795309).

200161491 is a wasteful number, since it uses less digits than its factorization.

200161491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18705.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 200161491 is about 14147.8440407010. The cubic root of 200161491 is about 584.9609061464.

The spelling of 200161491 in words is "two hundred million, one hundred sixty-one thousand, four hundred ninety-one".