15313223 has 2 divisors, whose sum is σ = 15313224. Its totient is φ = 15313222.

The previous prime is 15313219. The next prime is 15313229. The reversal of 15313223 is 32231351.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15313223 - 2² = 15313219 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 15313195 and 15313204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15313229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7656611 + 7656612.

It is an arithmetic number, because the mean of its divisors is an integer number (7656612).

Almost surely, 2^15313223 is an apocalyptic number.

15313223 is a deficient number, since it is larger than the sum of its proper divisors (1).

15313223 is an equidigital number, since it uses as much as digits as its factorization.

15313223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 20.

The square root of 15313223 is about 3913.2113410855. The cubic root of 15313223 is about 248.3260053190.

Adding to 15313223 its reverse (32231351), we get a palindrome (47544574).

The spelling of 15313223 in words is "fifteen million, three hundred thirteen thousand, two hundred twenty-three".