15221030 has 16 divisors (see below), whose sum is σ = 29888784. Its totient is φ = 5534880.

The previous prime is 15221029. The next prime is 15221039. The reversal of 15221030 is 3012251.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 15220996 and 15221014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15221039) 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, 69077 + ... + 69296.

It is an arithmetic number, because the mean of its divisors is an integer number (1868049).

Almost surely, 2^15221030 is an apocalyptic number.

15221030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15221030 is a deficient number, since it is larger than the sum of its proper divisors (14667754).

15221030 is a wasteful number, since it uses less digits than its factorization.

15221030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138391.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 15221030 is about 3901.4138462870. The cubic root of 15221030 is about 247.8266543583.

Adding to 15221030 its reverse (3012251), we get a palindrome (18233281).

It can be divided in two parts, 1522 and 1030, that added together give a palindrome (2552).

The spelling of 15221030 in words is "fifteen million, two hundred twenty-one thousand, thirty".