561222790 has 16 divisors (see below), whose sum is σ = 1045036080. Its totient is φ = 216748000.

The previous prime is 561222787. The next prime is 561222833. The reversal of 561222790 is 97222165.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 967336 + ... + 967915.

It is an arithmetic number, because the mean of its divisors is an integer number (65314755).

Almost surely, 2^561222790 is an apocalyptic number.

561222790 is a deficient number, since it is larger than the sum of its proper divisors (483813290).

561222790 is a wasteful number, since it uses less digits than its factorization.

561222790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935287.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 561222790 is about 23690.1411983973. The cubic root of 561222790 is about 824.8565603085.

The spelling of 561222790 in words is "five hundred sixty-one million, two hundred twenty-two thousand, seven hundred ninety".