561266203 has 16 divisors (see below), whose sum is σ = 617189760. Its totient is φ = 508032000.

The previous prime is 561266197. The next prime is 561266231. The reversal of 561266203 is 302662165.

561266203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561266203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561266243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131503 + ... + 135703.

It is an arithmetic number, because the mean of its divisors is an integer number (38574360).

Almost surely, 2^561266203 is an apocalyptic number.

561266203 is a deficient number, since it is larger than the sum of its proper divisors (55923557).

561266203 is a wasteful number, since it uses less digits than its factorization.

561266203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 561266203 is about 23691.0574479064. The cubic root of 561266203 is about 824.8778284960.

The spelling of 561266203 in words is "five hundred sixty-one million, two hundred sixty-six thousand, two hundred three".