15216145 has 16 divisors (see below), whose sum is σ = 21212928. Its totient is φ = 10261440.

The previous prime is 15216143. The next prime is 15216163. The reversal of 15216145 is 54161251.

It is a happy number.

It is not a de Polignac number, because 15216145 - 2¹ = 15216143 is a prime.

It is a super-3 number, since 3×15216145³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15216143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1429 + ... + 5698.

It is an arithmetic number, because the mean of its divisors is an integer number (1325808).

Almost surely, 2^15216145 is an apocalyptic number.

It is an amenable number.

15216145 is a deficient number, since it is larger than the sum of its proper divisors (5996783).

15216145 is an equidigital number, since it uses as much as digits as its factorization.

15216145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7200.

The product of its digits is 1200, while the sum is 25.

The square root of 15216145 is about 3900.7877409569. The cubic root of 15216145 is about 247.8001392289.

Adding to 15216145 its reverse (54161251), we get a palindrome (69377396).

The spelling of 15216145 in words is "fifteen million, two hundred sixteen thousand, one hundred forty-five".