15223261 has 4 divisors (see below), whose sum is σ = 15302332. Its totient is φ = 15144192.

The previous prime is 15223213. The next prime is 15223283. The reversal of 15223261 is 16232251.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4536900 + 10686361 = 2130^2 + 3269^2 .

It is a cyclic number.

It is not a de Polignac number, because 15223261 - 2¹⁵ = 15190493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15223661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39246 + ... + 39631.

It is an arithmetic number, because the mean of its divisors is an integer number (3825583).

Almost surely, 2^15223261 is an apocalyptic number.

It is an amenable number.

15223261 is a deficient number, since it is larger than the sum of its proper divisors (79071).

15223261 is an equidigital number, since it uses as much as digits as its factorization.

15223261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79070.

The product of its digits is 720, while the sum is 22.

The square root of 15223261 is about 3901.6997577979. The cubic root of 15223261 is about 247.8387620421.

The spelling of 15223261 in words is "fifteen million, two hundred twenty-three thousand, two hundred sixty-one".