16214381 has 2 divisors, whose sum is σ = 16214382. Its totient is φ = 16214380.

The previous prime is 16214377. The next prime is 16214417. The reversal of 16214381 is 18341261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14891881 + 1322500 = 3859^2 + 1150^2 .

It is an emirp because it is prime and its reverse (18341261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16214381 - 2² = 16214377 is a prime.

It is a super-2 number, since 2×16214381² = 525812302426322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16214381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16214351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8107190 + 8107191.

It is an arithmetic number, because the mean of its divisors is an integer number (8107191).

Almost surely, 2^16214381 is an apocalyptic number.

It is an amenable number.

16214381 is a deficient number, since it is larger than the sum of its proper divisors (1).

16214381 is an equidigital number, since it uses as much as digits as its factorization.

16214381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 16214381 is about 4026.7084572887. The cubic root of 16214381 is about 253.1046503175.

The spelling of 16214381 in words is "sixteen million, two hundred fourteen thousand, three hundred eighty-one".