16421313 has 8 divisors (see below), whose sum is σ = 22404448. Its totient is φ = 10692864.

The previous prime is 16421299. The next prime is 16421323. The reversal of 16421313 is 31312461.

16421313 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 16421313 - 2⁴ = 16421297 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 16421313.

It is not an unprimeable number, because it can be changed into a prime (16421323) 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, 63520 + ... + 63777.

It is an arithmetic number, because the mean of its divisors is an integer number (2800556).

Almost surely, 2^16421313 is an apocalyptic number.

It is an amenable number.

16421313 is a deficient number, since it is larger than the sum of its proper divisors (5983135).

16421313 is a wasteful number, since it uses less digits than its factorization.

16421313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127343.

The product of its digits is 432, while the sum is 21.

The square root of 16421313 is about 4052.3219269944. The cubic root of 16421313 is about 254.1768303858.

Adding to 16421313 its reverse (31312461), we get a palindrome (47733774).

The spelling of 16421313 in words is "sixteen million, four hundred twenty-one thousand, three hundred thirteen".