16131381 has 8 divisors (see below), whose sum is σ = 24581184. Its totient is φ = 9217920.

The previous prime is 16131373. The next prime is 16131397. The reversal of 16131381 is 18313161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16131381 - 2³ = 16131373 is a prime.

It is a super-2 number, since 2×16131381² = 520442905934322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16131331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384060 + ... + 384101.

It is an arithmetic number, because the mean of its divisors is an integer number (3072648).

Almost surely, 2^16131381 is an apocalyptic number.

It is an amenable number.

16131381 is a deficient number, since it is larger than the sum of its proper divisors (8449803).

16131381 is an equidigital number, since it uses as much as digits as its factorization.

16131381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768171.

The product of its digits is 432, while the sum is 24.

The square root of 16131381 is about 4016.3890498805. The cubic root of 16131381 is about 252.6720377750.

The spelling of 16131381 in words is "sixteen million, one hundred thirty-one thousand, three hundred eighty-one".