16149381 has 16 divisors (see below), whose sum is σ = 22995456. Its totient is φ = 10056816.

The previous prime is 16149349. The next prime is 16149409. The reversal of 16149381 is 18394161.

It is not a de Polignac number, because 16149381 - 2⁵ = 16149349 is a prime.

It is a super-2 number, since 2×16149381² = 521605013366322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16149311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246 + ... + 5688.

It is an arithmetic number, because the mean of its divisors is an integer number (1437216).

Almost surely, 2^16149381 is an apocalyptic number.

It is an amenable number.

16149381 is a deficient number, since it is larger than the sum of its proper divisors (6846075).

16149381 is a wasteful number, since it uses less digits than its factorization.

16149381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5512.

The product of its digits is 5184, while the sum is 33.

The square root of 16149381 is about 4018.6292439089. The cubic root of 16149381 is about 252.7659831536.

The spelling of 16149381 in words is "sixteen million, one hundred forty-nine thousand, three hundred eighty-one".