561100206 has 16 divisors (see below), whose sum is σ = 1148298624. Its totient is φ = 182683704.

The previous prime is 561100193. The next prime is 561100219. The reversal of 561100206 is 602001165.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (561100193) and next prime (561100219).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1087146 + ... + 1087661.

It is an arithmetic number, because the mean of its divisors is an integer number (71768664).

Almost surely, 2^561100206 is an apocalyptic number.

561100206 is an abundant number, since it is smaller than the sum of its proper divisors (587198418).

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

561100206 is a wasteful number, since it uses less digits than its factorization.

561100206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174855.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 561100206 is about 23687.5538205193. The cubic root of 561100206 is about 824.7965000370.

The spelling of 561100206 in words is "five hundred sixty-one million, one hundred thousand, two hundred six".