14220381 has 32 divisors (see below), whose sum is σ = 23355648. Its totient is φ = 7511040.

The previous prime is 14220373. The next prime is 14220383. The reversal of 14220381 is 18302241.

It is not a de Polignac number, because 14220381 - 2³ = 14220373 is a prime.

It is a super-2 number, since 2×14220381² = 404438471570322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14220383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21451 + ... + 22103.

It is an arithmetic number, because the mean of its divisors is an integer number (729864).

Almost surely, 2^14220381 is an apocalyptic number.

It is an amenable number.

14220381 is a deficient number, since it is larger than the sum of its proper divisors (9135267).

14220381 is a wasteful number, since it uses less digits than its factorization.

14220381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 14220381 is about 3770.9920445421. The cubic root of 14220381 is about 242.2722898759.

The spelling of 14220381 in words is "fourteen million, two hundred twenty thousand, three hundred eighty-one".