15212242 has 4 divisors (see below), whose sum is σ = 22818366. Its totient is φ = 7606120.

The previous prime is 15212237. The next prime is 15212243. The reversal of 15212242 is 24221251.

15212242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15139881 + 72361 = 3891^2 + 269^2 .

It is a super-4 number, since 4×15212242⁴ (a number of 30 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (15212243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3803059 + ... + 3803062.

Almost surely, 2^15212242 is an apocalyptic number.

15212242 is a deficient number, since it is larger than the sum of its proper divisors (7606124).

15212242 is an equidigital number, since it uses as much as digits as its factorization.

15212242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7606123.

The product of its digits is 320, while the sum is 19.

The square root of 15212242 is about 3900.2874253060. The cubic root of 15212242 is about 247.7789501860.

Adding to 15212242 its reverse (24221251), we get a palindrome (39433493).

Subtracting 15212242 from its reverse (24221251), we obtain a palindrome (9009009).

The spelling of 15212242 in words is "fifteen million, two hundred twelve thousand, two hundred forty-two".