101987565 has 16 divisors (see below), whose sum is σ = 163323456. Its totient is φ = 54345600.

The previous prime is 101987563. The next prime is 101987579. The reversal of 101987565 is 565789101.

It is not a de Polignac number, because 101987565 - 2¹ = 101987563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101987563) 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 15 ways as a sum of consecutive naturals, for example, 20745 + ... + 25185.

It is an arithmetic number, because the mean of its divisors is an integer number (10207716).

Almost surely, 2^101987565 is an apocalyptic number.

101987565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

101987565 is a deficient number, since it is larger than the sum of its proper divisors (61335891).

101987565 is a wasteful number, since it uses less digits than its factorization.

101987565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5980.

The product of its (nonzero) digits is 75600, while the sum is 42.

The square root of 101987565 is about 10098.8892953631. The cubic root of 101987565 is about 467.2138850025.

The spelling of 101987565 in words is "one hundred one million, nine hundred eighty-seven thousand, five hundred sixty-five".