14211981 has 48 divisors (see below), whose sum is σ = 25559040. Its totient is φ = 7426080.

The previous prime is 14211971. The next prime is 14211991. The reversal of 14211981 is 18911241.

It is an interprime number because it is at equal distance from previous prime (14211971) and next prime (14211991).

It is not a de Polignac number, because 14211981 - 2⁶ = 14211917 is a prime.

It is a super-2 number, since 2×14211981² = 403960807888722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14211971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36916 + ... + 37298.

It is an arithmetic number, because the mean of its divisors is an integer number (532480).

Almost surely, 2^14211981 is an apocalyptic number.

It is an amenable number.

14211981 is a deficient number, since it is larger than the sum of its proper divisors (11347059).

14211981 is a wasteful number, since it uses less digits than its factorization.

14211981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 443 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 14211981 is about 3769.8781147406. The cubic root of 14211981 is about 242.2245769472.

The spelling of 14211981 in words is "fourteen million, two hundred eleven thousand, nine hundred eighty-one".