16403313 has 8 divisors (see below), whose sum is σ = 21896800. Its totient is φ = 10922688.

The previous prime is 16403311. The next prime is 16403363. The reversal of 16403313 is 31330461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16403313 - 2¹ = 16403311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16403313.

It is not an unprimeable number, because it can be changed into a prime (16403311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318 + ... + 5736.

It is an arithmetic number, because the mean of its divisors is an integer number (2737100).

Almost surely, 2^16403313 is an apocalyptic number.

It is an amenable number.

16403313 is a deficient number, since it is larger than the sum of its proper divisors (5493487).

16403313 is a wasteful number, since it uses less digits than its factorization.

16403313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6431.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 16403313 is about 4050.1003691267. The cubic root of 16403313 is about 254.0839256012.

Adding to 16403313 its reverse (31330461), we get a palindrome (47733774).

The spelling of 16403313 in words is "sixteen million, four hundred three thousand, three hundred thirteen".