16201491 has 8 divisors (see below), whose sum is σ = 21722064. Its totient is φ = 10740960.

The previous prime is 16201489. The next prime is 16201501. The reversal of 16201491 is 19410261.

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

It is not a de Polignac number, because 16201491 - 2¹ = 16201489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16201421) 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, 14376 + ... + 15461.

It is an arithmetic number, because the mean of its divisors is an integer number (2715258).

Almost surely, 2^16201491 is an apocalyptic number.

16201491 is a deficient number, since it is larger than the sum of its proper divisors (5520573).

16201491 is a wasteful number, since it uses less digits than its factorization.

16201491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30021.

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

The square root of 16201491 is about 4025.1075762022. The cubic root of 16201491 is about 253.0375620567.

The spelling of 16201491 in words is "sixteen million, two hundred one thousand, four hundred ninety-one".