15216241 has 12 divisors (see below), whose sum is σ = 16438572. Its totient is φ = 14034944.

The previous prime is 15216239. The next prime is 15216259. The reversal of 15216241 is 14261251.

15216241 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 6 ways, for example, as 3629025 + 11587216 = 1905^2 + 3404^2 .

It is not a de Polignac number, because 15216241 - 2¹ = 15216239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15216221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134601 + ... + 134713.

It is an arithmetic number, because the mean of its divisors is an integer number (1369881).

Almost surely, 2^15216241 is an apocalyptic number.

It is an amenable number.

15216241 is a deficient number, since it is larger than the sum of its proper divisors (1222331).

15216241 is an equidigital number, since it uses as much as digits as its factorization.

15216241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 219 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 15216241 is about 3900.8000461444. The cubic root of 15216241 is about 247.8006603588.

Adding to 15216241 its reverse (14261251), we get a palindrome (29477492).

It can be divided in two parts, 1521 and 6241, that multiplied together give a square (9492561 = 3081²).

The spelling of 15216241 in words is "fifteen million, two hundred sixteen thousand, two hundred forty-one".