16145331 has 4 divisors (see below), whose sum is σ = 21527112. Its totient is φ = 10763552.

The previous prime is 16145321. The next prime is 16145341. The reversal of 16145331 is 13354161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13354161 = 3 ⋅4451387.

It is an interprime number because it is at equal distance from previous prime (16145321) and next prime (16145341).

It is a cyclic number.

It is not a de Polignac number, because 16145331 - 2¹³ = 16137139 is a prime.

It is a super-2 number, since 2×16145331² = 521343426199122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16145321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2690886 + ... + 2690891.

It is an arithmetic number, because the mean of its divisors is an integer number (5381778).

Almost surely, 2^16145331 is an apocalyptic number.

16145331 is a deficient number, since it is larger than the sum of its proper divisors (5381781).

16145331 is an equidigital number, since it uses as much as digits as its factorization.

16145331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5381780.

The product of its digits is 1080, while the sum is 24.

The square root of 16145331 is about 4018.1253091460. The cubic root of 16145331 is about 252.7448515321.

Adding to 16145331 its reverse (13354161), we get a palindrome (29499492).

The spelling of 16145331 in words is "sixteen million, one hundred forty-five thousand, three hundred thirty-one".