214003981 has 2 divisors, whose sum is σ = 214003982. Its totient is φ = 214003980.

The previous prime is 214003949. The next prime is 214004009. The reversal of 214003981 is 189300412.

It is a happy number.

It is an a-pointer prime, because the next prime (214004009) can be obtained adding 214003981 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206353225 + 7650756 = 14365^2 + 2766^2 .

It is a cyclic number.

It is not a de Polignac number, because 214003981 - 2⁵ = 214003949 is a prime.

It is a super-2 number, since 2×214003981² = 91595407767696722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214003381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107001990 + 107001991.

It is an arithmetic number, because the mean of its divisors is an integer number (107001991).

Almost surely, 2^214003981 is an apocalyptic number.

It is an amenable number.

214003981 is a deficient number, since it is larger than the sum of its proper divisors (1).

214003981 is an equidigital number, since it uses as much as digits as its factorization.

214003981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 214003981 is about 14628.8749054738. The cubic root of 214003981 is about 598.1461119910.

The spelling of 214003981 in words is "two hundred fourteen million, three thousand, nine hundred eighty-one".