15223120 has 40 divisors (see below), whose sum is σ = 38613600. Its totient is φ = 5535360.

The previous prime is 15223097. The next prime is 15223129. The reversal of 15223120 is 2132251.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 15223094 and 15223103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15223129) 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, 7770 + ... + 9529.

It is an arithmetic number, because the mean of its divisors is an integer number (965340).

Almost surely, 2^15223120 is an apocalyptic number.

15223120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15223120 is an abundant number, since it is smaller than the sum of its proper divisors (23390480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15223120 is a wasteful number, since it uses less digits than its factorization.

15223120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17323 (or 17317 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 15223120 is about 3901.6816887081. The cubic root of 15223120 is about 247.8379968672.

Adding to 15223120 its reverse (2132251), we get a palindrome (17355371).

It can be divided in two parts, 152231 and 20, that added together give a palindrome (152251).

The spelling of 15223120 in words is "fifteen million, two hundred twenty-three thousand, one hundred twenty".