101561567 has 4 divisors (see below), whose sum is σ = 105063720. Its totient is φ = 98059416.

The previous prime is 101561561. The next prime is 101561569. The reversal of 101561567 is 765165101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 765165101 = 5261 ⋅145441.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101561567 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 (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, 1751033 + ... + 1751090.

It is an arithmetic number, because the mean of its divisors is an integer number (26265930).

Almost surely, 2^101561567 is an apocalyptic number.

101561567 is a deficient number, since it is larger than the sum of its proper divisors (3502153).

101561567 is an equidigital number, since it uses as much as digits as its factorization.

101561567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3502152.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 101561567 is about 10077.7758955039. The cubic root of 101561567 is about 466.5624659074.

The spelling of 101561567 in words is "one hundred one million, five hundred sixty-one thousand, five hundred sixty-seven".