561500722 has 4 divisors (see below), whose sum is σ = 842251086. Its totient is φ = 280750360.

The previous prime is 561500717. The next prime is 561500759. The reversal of 561500722 is 227005165.

561500722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 560221561 + 1279161 = 23669^2 + 1131^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140375179 + ... + 140375182.

Almost surely, 2^561500722 is an apocalyptic number.

561500722 is a deficient number, since it is larger than the sum of its proper divisors (280750364).

561500722 is a wasteful number, since it uses less digits than its factorization.

561500722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280750363.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 561500722 is about 23696.0064567851. The cubic root of 561500722 is about 824.9927012516.

Adding to 561500722 its reverse (227005165), we get a palindrome (788505887).

It can be divided in two parts, 56 and 1500722, that added together give a triangular number (1500778 = T₁₇₃₂).

The spelling of 561500722 in words is "five hundred sixty-one million, five hundred thousand, seven hundred twenty-two".