561252266 has 4 divisors (see below), whose sum is σ = 841878402. Its totient is φ = 280626132.

The previous prime is 561252247. The next prime is 561252313. The reversal of 561252266 is 662252165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 480881041 + 80371225 = 21929^2 + 8965^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140313065 + ... + 140313068.

Almost surely, 2^561252266 is an apocalyptic number.

561252266 is a deficient number, since it is larger than the sum of its proper divisors (280626136).

561252266 is a wasteful number, since it uses less digits than its factorization.

561252266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280626135.

The product of its digits is 43200, while the sum is 35.

The square root of 561252266 is about 23690.7633055586. The cubic root of 561252266 is about 824.8710008283.

The spelling of 561252266 in words is "five hundred sixty-one million, two hundred fifty-two thousand, two hundred sixty-six".