16091331 has 8 divisors (see below), whose sum is σ = 21954240. Its totient is φ = 10477992.

The previous prime is 16091321. The next prime is 16091353. The reversal of 16091331 is 13319061.

16091331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 16091331 - 2¹⁰ = 16090307 is a prime.

It is a super-2 number, since 2×16091331² = 517861866703122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16091321) 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, 62241 + ... + 62498.

It is an arithmetic number, because the mean of its divisors is an integer number (2744280).

Almost surely, 2^16091331 is an apocalyptic number.

16091331 is a deficient number, since it is larger than the sum of its proper divisors (5862909).

16091331 is a wasteful number, since it uses less digits than its factorization.

16091331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124785.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 16091331 is about 4011.4001296306. The cubic root of 16091331 is about 252.4627582887.

The spelling of 16091331 in words is "sixteen million, ninety-one thousand, three hundred thirty-one".