15230561 has 4 divisors (see below), whose sum is σ = 15297300. Its totient is φ = 15163824.

The previous prime is 15230543. The next prime is 15230563. The reversal of 15230561 is 16503251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16503251 = 47 ⋅351133.

It can be written as a sum of positive squares in 2 ways, for example, as 13653025 + 1577536 = 3695^2 + 1256^2 .

It is a cyclic number.

It is not a de Polignac number, because 15230561 - 2¹⁰ = 15229537 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (15230563) 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 3 ways as a sum of consecutive naturals, for example, 33026 + ... + 33483.

It is an arithmetic number, because the mean of its divisors is an integer number (3824325).

Almost surely, 2^15230561 is an apocalyptic number.

It is an amenable number.

15230561 is a deficient number, since it is larger than the sum of its proper divisors (66739).

15230561 is an equidigital number, since it uses as much as digits as its factorization.

15230561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66738.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 15230561 is about 3902.6351353925. The cubic root of 15230561 is about 247.8783710293.

The spelling of 15230561 in words is "fifteen million, two hundred thirty thousand, five hundred sixty-one".