561110100 has 72 divisors (see below), whose sum is σ = 1625937600. Its totient is φ = 149402880.

The previous prime is 561110087. The next prime is 561110141. The reversal of 561110100 is 1011165.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 561110100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 313809 + ... + 315591.

Almost surely, 2^561110100 is an apocalyptic number.

561110100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561110100 is an abundant number, since it is smaller than the sum of its proper divisors (1064827500).

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

561110100 is a wasteful number, since it uses less digits than its factorization.

561110100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2849 (or 2842 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 561110100 is about 23687.7626634514. The cubic root of 561110100 is about 824.8013479463.

Adding to 561110100 its reverse (1011165), we get a palindrome (562121265).

The spelling of 561110100 in words is "five hundred sixty-one million, one hundred ten thousand, one hundred".