15211242 has 12 divisors (see below), whose sum is σ = 32957730. Its totient is φ = 5070408.

The previous prime is 15211219. The next prime is 15211271. The reversal of 15211242 is 24211251.

15211242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 13111641 + 2099601 = 3621^2 + 1449^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 845069 = 15211242 / (1 + 5 + 2 + 1 + 1 + 2 + 4 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 422517 + ... + 422552.

Almost surely, 2^15211242 is an apocalyptic number.

15211242 is an abundant number, since it is smaller than the sum of its proper divisors (17746488).

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

15211242 is a wasteful number, since it uses less digits than its factorization.

15211242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845077 (or 845074 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 15211242 is about 3900.1592275188. The cubic root of 15211242 is about 247.7735206909.

Adding to 15211242 its reverse (24211251), we get a palindrome (39422493).

Subtracting 15211242 from its reverse (24211251), we obtain a palindrome (9000009).

The spelling of 15211242 in words is "fifteen million, two hundred eleven thousand, two hundred forty-two".