87181012 has 12 divisors (see below), whose sum is σ = 152700660. Its totient is φ = 43552256.

The previous prime is 87180997. The next prime is 87181013. The reversal of 87181012 is 21018178.

It can be written as a sum of positive squares in 2 ways, for example, as 33686416 + 53494596 = 5804^2 + 7314^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87181013) 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, 4087 + ... + 13822.

It is an arithmetic number, because the mean of its divisors is an integer number (12725055).

Almost surely, 2^87181012 is an apocalyptic number.

It is an amenable number.

87181012 is a deficient number, since it is larger than the sum of its proper divisors (65519648).

87181012 is a wasteful number, since it uses less digits than its factorization.

87181012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19130 (or 19128 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 87181012 is about 9337.0772728943. The cubic root of 87181012 is about 443.4118568707.

It can be divided in two parts, 8718 and 1012, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 87181012 in words is "eighty-seven million, one hundred eighty-one thousand, twelve".