561233385 has 24 divisors (see below), whose sum is σ = 977860104. Its totient is φ = 297768960.

The previous prime is 561233369. The next prime is 561233389. The reversal of 561233385 is 583332165.

561233385 is a `hidden beast` number, since 5 + 612 + 3 + 3 + 38 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13111641 + 548121744 = 3621^2 + 23412^2 .

It is not a de Polignac number, because 561233385 - 2⁴ = 561233369 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (561233389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23626 + ... + 40995.

It is an arithmetic number, because the mean of its divisors is an integer number (40744171).

Almost surely, 2^561233385 is an apocalyptic number.

It is an amenable number.

561233385 is a deficient number, since it is larger than the sum of its proper divisors (416626719).

561233385 is a wasteful number, since it uses less digits than its factorization.

561233385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64825 (or 64822 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 561233385 is about 23690.3648135692. The cubic root of 561233385 is about 824.8617509389.

The spelling of 561233385 in words is "five hundred sixty-one million, two hundred thirty-three thousand, three hundred eighty-five".