561515101 has 8 divisors (see below), whose sum is σ = 642032064. Its totient is φ = 481073280.

The previous prime is 561515069. The next prime is 561515107. The reversal of 561515101 is 101515165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561515101 - 2⁵ = 561515069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561515107) 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 7 ways as a sum of consecutive naturals, for example, 1735 + ... + 33556.

It is an arithmetic number, because the mean of its divisors is an integer number (80254008).

Almost surely, 2^561515101 is an apocalyptic number.

It is an amenable number.

561515101 is a deficient number, since it is larger than the sum of its proper divisors (80516963).

561515101 is a wasteful number, since it uses less digits than its factorization.

561515101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37571.

The product of its (nonzero) digits is 750, while the sum is 25.

The square root of 561515101 is about 23696.3098603981. The cubic root of 561515101 is about 824.9997433730. Note that the first 3 decimals are identical.

The spelling of 561515101 in words is "five hundred sixty-one million, five hundred fifteen thousand, one hundred one".