214387931 has 2 divisors, whose sum is σ = 214387932. Its totient is φ = 214387930.

The previous prime is 214387913. The next prime is 214387951. The reversal of 214387931 is 139783412.

Together with previous prime (214387913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-214387931 is a prime.

It is a super-2 number, since 2×214387931² = 91924369916921522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (214387951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107193965 + 107193966.

It is an arithmetic number, because the mean of its divisors is an integer number (107193966).

Almost surely, 2^214387931 is an apocalyptic number.

214387931 is a deficient number, since it is larger than the sum of its proper divisors (1).

214387931 is an equidigital number, since it uses as much as digits as its factorization.

214387931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 214387931 is about 14641.9920434345. The cubic root of 214387931 is about 598.5036146726.

The spelling of 214387931 in words is "two hundred fourteen million, three hundred eighty-seven thousand, nine hundred thirty-one".