16011381 has 8 divisors (see below), whose sum is σ = 22276800. Its totient is φ = 10210112.

The previous prime is 16011329. The next prime is 16011383. The reversal of 16011381 is 18311061.

16011381 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 a cyclic number.

It is not a de Polignac number, because 16011381 - 2¹¹ = 16009333 is a prime.

It is a super-3 number, since 3×16011381³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16011383) 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, 115956 + ... + 116093.

It is an arithmetic number, because the mean of its divisors is an integer number (2784600).

Almost surely, 2^16011381 is an apocalyptic number.

It is an amenable number.

16011381 is a deficient number, since it is larger than the sum of its proper divisors (6265419).

16011381 is a wasteful number, since it uses less digits than its factorization.

16011381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232075.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 16011381 is about 4001.4223721072. The cubic root of 16011381 is about 252.0439423245.

The spelling of 16011381 in words is "sixteen million, eleven thousand, three hundred eighty-one".