4331561 has 4 divisors (see below), whose sum is σ = 4664772. Its totient is φ = 3998352.

The previous prime is 4331557. The next prime is 4331573. The reversal of 4331561 is 1651334.

It is a happy number.

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 2560000 + 1771561 = 1600^2 + 1331^2 .

It is a cyclic number.

It is not a de Polignac number, because 4331561 - 2² = 4331557 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (4331581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166586 + ... + 166611.

It is an arithmetic number, because the mean of its divisors is an integer number (1166193).

Almost surely, 2^4331561 is an apocalyptic number.

It is an amenable number.

4331561 is a deficient number, since it is larger than the sum of its proper divisors (333211).

4331561 is a wasteful number, since it uses less digits than its factorization.

4331561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333210.

The product of its digits is 1080, while the sum is 23.

The square root of 4331561 is about 2081.2402552324. The cubic root of 4331561 is about 163.0102117632.

Adding to 4331561 its reverse (1651334), we get a palindrome (5982895).

The spelling of 4331561 in words is "four million, three hundred thirty-one thousand, five hundred sixty-one".