15216261 has 8 divisors (see below), whose sum is σ = 20333664. Its totient is φ = 10121520.

The previous prime is 15216259. The next prime is 15216301. The reversal of 15216261 is 16261251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15216261 - 2¹ = 15216259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15216221) 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 7 ways as a sum of consecutive naturals, for example, 4030 + ... + 6831.

It is an arithmetic number, because the mean of its divisors is an integer number (2541708).

Almost surely, 2^15216261 is an apocalyptic number.

It is an amenable number.

15216261 is a deficient number, since it is larger than the sum of its proper divisors (5117403).

15216261 is a wasteful number, since it uses less digits than its factorization.

15216261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11331.

The product of its digits is 720, while the sum is 24.

The square root of 15216261 is about 3900.8026097202. The cubic root of 15216261 is about 247.8007689272.

The spelling of 15216261 in words is "fifteen million, two hundred sixteen thousand, two hundred sixty-one".