87451565 has 16 divisors (see below), whose sum is σ = 108380160. Its totient is φ = 67697280.

The previous prime is 87451531. The next prime is 87451571. The reversal of 87451565 is 56515478.

It is not a de Polignac number, because 87451565 - 2²⁰ = 86402989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24356 + ... + 27714.

It is an arithmetic number, because the mean of its divisors is an integer number (6773760).

Almost surely, 2^87451565 is an apocalyptic number.

It is an amenable number.

87451565 is a deficient number, since it is larger than the sum of its proper divisors (20928595).

87451565 is a wasteful number, since it uses less digits than its factorization.

87451565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3532.

The product of its digits is 168000, while the sum is 41.

The square root of 87451565 is about 9351.5541489102. The cubic root of 87451565 is about 443.8700702657.

The spelling of 87451565 in words is "eighty-seven million, four hundred fifty-one thousand, five hundred sixty-five".