214981139 has 2 divisors, whose sum is σ = 214981140. Its totient is φ = 214981138.

The previous prime is 214981127. The next prime is 214981177. The reversal of 214981139 is 931189412.

It is an a-pointer prime, because the next prime (214981177) can be obtained adding 214981139 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 214981139 - 2²⁴ = 198203923 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (214984139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107490569 + 107490570.

It is an arithmetic number, because the mean of its divisors is an integer number (107490570).

Almost surely, 2^214981139 is an apocalyptic number.

214981139 is a deficient number, since it is larger than the sum of its proper divisors (1).

214981139 is an equidigital number, since it uses as much as digits as its factorization.

214981139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 214981139 is about 14662.2351297474. The cubic root of 214981139 is about 599.0551229786.

The spelling of 214981139 in words is "two hundred fourteen million, nine hundred eighty-one thousand, one hundred thirty-nine".