16445131 has 4 divisors (see below), whose sum is σ = 16889632. Its totient is φ = 16000632.

The previous prime is 16445119. The next prime is 16445167. The reversal of 16445131 is 13154461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13154461 = 97 ⋅135613.

It is a cyclic number.

It is not a de Polignac number, because 16445131 - 2¹¹ = 16443083 is a prime.

It is a super-2 number, since 2×16445131² = 540884667214322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16445096 and 16445105.

It is not an unprimeable number, because it can be changed into a prime (16445101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222195 + ... + 222268.

It is an arithmetic number, because the mean of its divisors is an integer number (4222408).

Almost surely, 2^16445131 is an apocalyptic number.

16445131 is a deficient number, since it is larger than the sum of its proper divisors (444501).

16445131 is an equidigital number, since it uses as much as digits as its factorization.

16445131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444500.

The product of its digits is 1440, while the sum is 25.

The square root of 16445131 is about 4055.2596710938. The cubic root of 16445131 is about 254.2996597669.

Adding to 16445131 its reverse (13154461), we get a palindrome (29599592).

The spelling of 16445131 in words is "sixteen million, four hundred forty-five thousand, one hundred thirty-one".