87525381 has 16 divisors (see below), whose sum is σ = 123737600. Its totient is φ = 54876528.

The previous prime is 87525377. The next prime is 87525397. The reversal of 87525381 is 18352578.

It is not a de Polignac number, because 87525381 - 2² = 87525377 is a prime.

It is a super-2 number, since 2×87525381² = 15321384638390322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is the 9356-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87525481) by changing a digit.

It is a nontrivial repunit in base 9355.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2400 + ... + 13446.

It is an arithmetic number, because the mean of its divisors is an integer number (7733600).

Almost surely, 2^87525381 is an apocalyptic number.

It is an amenable number.

87525381 is a deficient number, since it is larger than the sum of its proper divisors (36212219).

87525381 is a wasteful number, since it uses less digits than its factorization.

87525381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11208.

The product of its digits is 67200, while the sum is 39.

The square root of 87525381 is about 9355.5000400834. The cubic root of 87525381 is about 443.9949222291.

The spelling of 87525381 in words is "eighty-seven million, five hundred twenty-five thousand, three hundred eighty-one".