15220004 has 6 divisors (see below), whose sum is σ = 26635014. Its totient is φ = 7610000.

The previous prime is 15220003. The next prime is 15220013. The reversal of 15220004 is 40002251.

It can be written as a sum of positive squares in only one way, i.e., 15194404 + 25600 = 3898^2 + 160^2 .

It is not an unprimeable number, because it can be changed into a prime (15220003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1902497 + ... + 1902504.

It is an arithmetic number, because the mean of its divisors is an integer number (4439169).

Almost surely, 2^15220004 is an apocalyptic number.

It is an amenable number.

15220004 is a deficient number, since it is larger than the sum of its proper divisors (11415010).

15220004 is a wasteful number, since it uses less digits than its factorization.

15220004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3805005 (or 3805003 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 15220004 is about 3901.2823532782. The cubic root of 15220004 is about 247.8210858377.

Adding to 15220004 its reverse (40002251), we get a palindrome (55222255).

The spelling of 15220004 in words is "fifteen million, two hundred twenty thousand, four".