561505222 has 4 divisors (see below), whose sum is σ = 842257836. Its totient is φ = 280752610.

The previous prime is 561505199. The next prime is 561505261. The reversal of 561505222 is 222505165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222505165 = 5 ⋅44501033.

It is a super-2 number, since 2×561505222² = 630576228666538568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140376304 + ... + 140376307.

It is an arithmetic number, because the mean of its divisors is an integer number (210564459).

Almost surely, 2^561505222 is an apocalyptic number.

561505222 is a deficient number, since it is larger than the sum of its proper divisors (280752614).

561505222 is a wasteful number, since it uses less digits than its factorization.

561505222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280752613.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 561505222 is about 23696.1014093036. The cubic root of 561505222 is about 824.9949051415.

The spelling of 561505222 in words is "five hundred sixty-one million, five hundred five thousand, two hundred twenty-two".