16231604 has 12 divisors (see below), whose sum is σ = 29173284. Its totient is φ = 7896384.

The previous prime is 16231603. The next prime is 16231637. The reversal of 16231604 is 40613261.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9314704 + 6916900 = 3052^2 + 2630^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16231604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16231601) 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, 54689 + ... + 54984.

It is an arithmetic number, because the mean of its divisors is an integer number (2431107).

Almost surely, 2^16231604 is an apocalyptic number.

It is an amenable number.

16231604 is a deficient number, since it is larger than the sum of its proper divisors (12941680).

16231604 is a wasteful number, since it uses less digits than its factorization.

16231604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109714 (or 109712 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 16231604 is about 4028.8464850376. The cubic root of 16231604 is about 253.1942349655.

Adding to 16231604 its reverse (40613261), we get a palindrome (56844865).

The spelling of 16231604 in words is "sixteen million, two hundred thirty-one thousand, six hundred four".