16331345 has 4 divisors (see below), whose sum is σ = 19597620. Its totient is φ = 13065072.

The previous prime is 16331323. The next prime is 16331351. The reversal of 16331345 is 54313361.

16331345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54313361 = 3823 ⋅14207.

It can be written as a sum of positive squares in 2 ways, for example, as 10916416 + 5414929 = 3304^2 + 2327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16331345 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1633130 + ... + 1633139.

It is an arithmetic number, because the mean of its divisors is an integer number (4899405).

Almost surely, 2^16331345 is an apocalyptic number.

It is an amenable number.

16331345 is a deficient number, since it is larger than the sum of its proper divisors (3266275).

16331345 is an equidigital number, since it uses as much as digits as its factorization.

16331345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3266274.

The product of its digits is 3240, while the sum is 26.

The square root of 16331345 is about 4041.2058843865. The cubic root of 16331345 is about 253.7117910227.

The spelling of 16331345 in words is "sixteen million, three hundred thirty-one thousand, three hundred forty-five".