561101055 has 16 divisors (see below), whose sum is σ = 909127680. Its totient is φ = 295465248.

The previous prime is 561101053. The next prime is 561101063. The reversal of 561101055 is 550101165.

It is not a de Polignac number, because 561101055 - 2¹ = 561101053 is a prime.

It is a super-2 number, since 2×561101055² = 629668787844226050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561101053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235567 + ... + 237936.

It is an arithmetic number, because the mean of its divisors is an integer number (56820480).

Almost surely, 2^561101055 is an apocalyptic number.

561101055 is a deficient number, since it is larger than the sum of its proper divisors (348026625).

561101055 is a wasteful number, since it uses less digits than its factorization.

561101055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473590.

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

The square root of 561101055 is about 23687.5717413162. The cubic root of 561101055 is about 824.7969160363.

The spelling of 561101055 in words is "five hundred sixty-one million, one hundred one thousand, fifty-five".