87111545 has 4 divisors (see below), whose sum is σ = 104533860. Its totient is φ = 69689232.

The previous prime is 87111527. The next prime is 87111547. The reversal of 87111545 is 54511178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54511178 = 2 ⋅27255589.

It can be written as a sum of positive squares in 2 ways, for example, as 61669609 + 25441936 = 7853^2 + 5044^2 .

It is a cyclic number.

It is not a de Polignac number, because 87111545 - 2⁶ = 87111481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87111547) 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, 8711150 + ... + 8711159.

It is an arithmetic number, because the mean of its divisors is an integer number (26133465).

Almost surely, 2^87111545 is an apocalyptic number.

It is an amenable number.

87111545 is a deficient number, since it is larger than the sum of its proper divisors (17422315).

87111545 is a wasteful number, since it uses less digits than its factorization.

87111545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17422314.

The product of its digits is 5600, while the sum is 32.

The square root of 87111545 is about 9333.3565773520. The cubic root of 87111545 is about 443.2940534039.

The spelling of 87111545 in words is "eighty-seven million, one hundred eleven thousand, five hundred forty-five".