87160581 has 24 divisors (see below), whose sum is σ = 140325120. Its totient is φ = 51808896.

The previous prime is 87160571. The next prime is 87160583. The reversal of 87160581 is 18506178.

87160581 is a `hidden beast` number, since 8 + 71 + 6 + 0 + 581 = 666.

It is not a de Polignac number, because 87160581 - 2⁶ = 87160517 is a prime.

It is a super-2 number, since 2×87160581² = 15193933760515122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87160583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12085 + ... + 17898.

It is an arithmetic number, because the mean of its divisors is an integer number (5846880).

Almost surely, 2^87160581 is an apocalyptic number.

It is an amenable number.

87160581 is a deficient number, since it is larger than the sum of its proper divisors (53164539).

87160581 is a wasteful number, since it uses less digits than its factorization.

87160581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30025 (or 30022 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 87160581 is about 9335.9831298048. The cubic root of 87160581 is about 443.3772160882.

The spelling of 87160581 in words is "eighty-seven million, one hundred sixty thousand, five hundred eighty-one".