561112100 has 18 divisors (see below), whose sum is σ = 1217613474. Its totient is φ = 224444800.

The previous prime is 561112087. The next prime is 561112103. The reversal of 561112100 is 1211165.

It can be written as a sum of positive squares in 3 ways, for example, as 94206436 + 466905664 = 9706^2 + 21608^2 .

It is not an unprimeable number, because it can be changed into a prime (561112103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2805461 + ... + 2805660.

It is an arithmetic number, because the mean of its divisors is an integer number (67645193).

Almost surely, 2^561112100 is an apocalyptic number.

561112100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561112100 is an abundant number, since it is smaller than the sum of its proper divisors (656501374).

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

561112100 is a wasteful number, since it uses less digits than its factorization.

561112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611135 (or 5611128 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 561112100 is about 23687.8048793045. The cubic root of 561112100 is about 824.8023279089.

Adding to 561112100 its reverse (1211165), we get a palindrome (562323265).

The spelling of 561112100 in words is "five hundred sixty-one million, one hundred twelve thousand, one hundred".