15220242 has 24 divisors (see below), whose sum is σ = 33050316. Its totient is φ = 5062176.

The previous prime is 15220241. The next prime is 15220243. The reversal of 15220242 is 24202251.

It is an interprime number because it is at equal distance from previous prime (15220241) and next prime (15220243).

It can be written as a sum of positive squares in 2 ways, for example, as 14447601 + 772641 = 3801^2 + 879^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (15220241) 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 in 11 ways as a sum of consecutive naturals, for example, 13068 + ... + 14184.

Almost surely, 2^15220242 is an apocalyptic number.

15220242 is an abundant number, since it is smaller than the sum of its proper divisors (17830074).

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

15220242 is a wasteful number, since it uses less digits than its factorization.

15220242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882 (or 1879 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 15220242 is about 3901.3128559499. The cubic root of 15220242 is about 247.8223775831.

Adding to 15220242 its reverse (24202251), we get a palindrome (39422493).

Subtracting 15220242 from its reverse (24202251), we obtain a square (8982009 = 2997²).

The spelling of 15220242 in words is "fifteen million, two hundred twenty thousand, two hundred forty-two".