561550101 has 16 divisors (see below), whose sum is σ = 856047744. Its totient is φ = 320753664.

The previous prime is 561550097. The next prime is 561550117. The reversal of 561550101 is 101055165.

It is not a de Polignac number, because 561550101 - 2² = 561550097 is a prime.

It is a super-2 number, since 2×561550101² = 630677031866220402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561550181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72261 + ... + 79653.

It is an arithmetic number, because the mean of its divisors is an integer number (53502984).

Almost surely, 2^561550101 is an apocalyptic number.

It is an amenable number.

561550101 is a deficient number, since it is larger than the sum of its proper divisors (294497643).

561550101 is a wasteful number, since it uses less digits than its factorization.

561550101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11020.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 561550101 is about 23697.0483605026. The cubic root of 561550101 is about 825.0168841356.

The spelling of 561550101 in words is "five hundred sixty-one million, five hundred fifty thousand, one hundred one".