561155208 has 32 divisors (see below), whose sum is σ = 1404820800. Its totient is φ = 186794048.

The previous prime is 561155201. The next prime is 561155263. The reversal of 561155208 is 802551165.

It is not an unprimeable number, because it can be changed into a prime (561155201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2098 + ... + 33566.

It is an arithmetic number, because the mean of its divisors is an integer number (43900650).

Almost surely, 2^561155208 is an apocalyptic number.

It is an amenable number.

561155208 is an abundant number, since it is smaller than the sum of its proper divisors (843665592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561155208 is a wasteful number, since it uses less digits than its factorization.

561155208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32221 (or 32217 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 561155208 is about 23688.7147815157. The cubic root of 561155208 is about 824.8234494568.

The spelling of 561155208 in words is "five hundred sixty-one million, one hundred fifty-five thousand, two hundred eight".