15320530 has 32 divisors (see below), whose sum is σ = 29289600. Its totient is φ = 5757312.

The previous prime is 15320527. The next prime is 15320537. The reversal of 15320530 is 3502351.

It is a junction number, because it is equal to n+sod(n) for n = 15320498 and 15320507.

It is not an unprimeable number, because it can be changed into a prime (15320537) 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 in 15 ways as a sum of consecutive naturals, for example, 13006 + ... + 14134.

It is an arithmetic number, because the mean of its divisors is an integer number (915300).

Almost surely, 2^15320530 is an apocalyptic number.

15320530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15320530 is a deficient number, since it is larger than the sum of its proper divisors (13969070).

15320530 is a wasteful number, since it uses less digits than its factorization.

15320530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 15320530 is about 3914.1448619079. The cubic root of 15320530 is about 248.3654968876.

Adding to 15320530 its reverse (3502351), we get a palindrome (18822881).

The spelling of 15320530 in words is "fifteen million, three hundred twenty thousand, five hundred thirty".