13223919 has 16 divisors (see below), whose sum is σ = 18830592. Its totient is φ = 8234688.

The previous prime is 13223893. The next prime is 13223923. The reversal of 13223919 is 91932231.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-13223919 is a prime.

It is a super-2 number, since 2×13223919² = 349744067437122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 739 + ... + 5195.

It is an arithmetic number, because the mean of its divisors is an integer number (1176912).

Almost surely, 2^13223919 is an apocalyptic number.

13223919 is a deficient number, since it is larger than the sum of its proper divisors (5606673).

13223919 is a wasteful number, since it uses less digits than its factorization.

13223919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4526.

The product of its digits is 2916, while the sum is 30.

The square root of 13223919 is about 3636.4706791063. The cubic root of 13223919 is about 236.4758127612.

The spelling of 13223919 in words is "thirteen million, two hundred twenty-three thousand, nine hundred nineteen".