15228823 has 4 divisors (see below), whose sum is σ = 16030360. Its totient is φ = 14427288.

The previous prime is 15228817. The next prime is 15228827. The reversal of 15228823 is 32882251.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15228823 - 2¹³ = 15220631 is a prime.

It is a super-3 number, since 3×15228823³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15228827) 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, 400740 + ... + 400777.

It is an arithmetic number, because the mean of its divisors is an integer number (4007590).

Almost surely, 2^15228823 is an apocalyptic number.

15228823 is a deficient number, since it is larger than the sum of its proper divisors (801537).

15228823 is an equidigital number, since it uses as much as digits as its factorization.

15228823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801536.

The product of its digits is 7680, while the sum is 31.

The square root of 15228823 is about 3902.4124589797. The cubic root of 15228823 is about 247.8689419829.

The spelling of 15228823 in words is "fifteen million, two hundred twenty-eight thousand, eight hundred twenty-three".