16330381 has 2 divisors, whose sum is σ = 16330382. Its totient is φ = 16330380.

The previous prime is 16330373. The next prime is 16330409. The reversal of 16330381 is 18303361.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15444900 + 885481 = 3930^2 + 941^2 .

It is a cyclic number.

It is not a de Polignac number, because 16330381 - 2³ = 16330373 is a prime.

It is a super-2 number, since 2×16330381² = 533362687210322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16330331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8165190 + 8165191.

It is an arithmetic number, because the mean of its divisors is an integer number (8165191).

Almost surely, 2^16330381 is an apocalyptic number.

It is an amenable number.

16330381 is a deficient number, since it is larger than the sum of its proper divisors (1).

16330381 is an equidigital number, since it uses as much as digits as its factorization.

16330381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 16330381 is about 4041.0866112965. The cubic root of 16330381 is about 253.7067989256.

The spelling of 16330381 in words is "sixteen million, three hundred thirty thousand, three hundred eighty-one".