561056101 has 12 divisors (see below), whose sum is σ = 575258112. Its totient is φ = 547170000.

The previous prime is 561056099. The next prime is 561056107. The reversal of 561056101 is 101650165.

It is not a de Polignac number, because 561056101 - 2¹ = 561056099 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561056107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 486876 + ... + 488026.

It is an arithmetic number, because the mean of its divisors is an integer number (47938176).

Almost surely, 2^561056101 is an apocalyptic number.

It is an amenable number.

561056101 is a deficient number, since it is larger than the sum of its proper divisors (14202011).

561056101 is a wasteful number, since it uses less digits than its factorization.

561056101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404 (or 1343 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 561056101 is about 23686.6228280859. The cubic root of 561056101 is about 824.7748885658.

The spelling of 561056101 in words is "five hundred sixty-one million, fifty-six thousand, one hundred one".