101561566 has 8 divisors (see below), whose sum is σ = 152603640. Its totient is φ = 50693688.

The previous prime is 101561561. The next prime is 101561569. The reversal of 101561566 is 665165101.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101561561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42081 + ... + 44428.

It is an arithmetic number, because the mean of its divisors is an integer number (19075455).

Almost surely, 2^101561566 is an apocalyptic number.

101561566 is a deficient number, since it is larger than the sum of its proper divisors (51042074).

101561566 is an equidigital number, since it uses as much as digits as its factorization.

101561566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87098.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 101561566 is about 10077.7758458898. The cubic root of 101561566 is about 466.5624643761.

The spelling of 101561566 in words is "one hundred one million, five hundred sixty-one thousand, five hundred sixty-six".