16381975 has 12 divisors (see below), whose sum is σ = 20405440. Its totient is φ = 13046400.

The previous prime is 16381961. The next prime is 16381979. The reversal of 16381975 is 57918361.

It is not a de Polignac number, because 16381975 - 2⁷ = 16381847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16381979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4666 + ... + 7384.

Almost surely, 2^16381975 is an apocalyptic number.

16381975 is a deficient number, since it is larger than the sum of its proper divisors (4023465).

16381975 is a wasteful number, since it uses less digits than its factorization.

16381975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970 (or 2965 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The square root of 16381975 is about 4047.4652561819. The cubic root of 16381975 is about 253.9737040585.

The spelling of 16381975 in words is "sixteen million, three hundred eighty-one thousand, nine hundred seventy-five".