561342303 has 12 divisors (see below), whose sum is σ = 818004720. Its totient is φ = 370915776.

The previous prime is 561342283. The next prime is 561342307. The reversal of 561342303 is 303243165.

It is a happy number.

561342303 is a `hidden beast` number, since 5 + 613 + 42 + 3 + 0 + 3 = 666.

It is not a de Polignac number, because 561342303 - 2⁹ = 561341791 is a prime.

It is a super-2 number, since 2×561342303² = 630210362274687618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561342307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 274963 + ... + 276996.

It is an arithmetic number, because the mean of its divisors is an integer number (68167060).

Almost surely, 2^561342303 is an apocalyptic number.

561342303 is a deficient number, since it is larger than the sum of its proper divisors (256662417).

561342303 is a wasteful number, since it uses less digits than its factorization.

561342303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552078 (or 552075 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 561342303 is about 23692.6634847161. The cubic root of 561342303 is about 824.9151075183.

Adding to 561342303 its reverse (303243165), we get a palindrome (864585468).

The spelling of 561342303 in words is "five hundred sixty-one million, three hundred forty-two thousand, three hundred three".