87211156 has 12 divisors (see below), whose sum is σ = 161597268. Its totient is φ = 41040512.

The previous prime is 87211133. The next prime is 87211169. The reversal of 87211156 is 65111278.

It can be written as a sum of positive squares in 2 ways, for example, as 76842756 + 10368400 = 8766^2 + 3220^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641191 + ... + 641326.

It is an arithmetic number, because the mean of its divisors is an integer number (13466439).

Almost surely, 2^87211156 is an apocalyptic number.

It is an amenable number.

87211156 is a deficient number, since it is larger than the sum of its proper divisors (74386112).

87211156 is a wasteful number, since it uses less digits than its factorization.

87211156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282538 (or 1282536 counting only the distinct ones).

The product of its digits is 3360, while the sum is 31.

The square root of 87211156 is about 9338.6913430095. The cubic root of 87211156 is about 443.4629561735.

The spelling of 87211156 in words is "eighty-seven million, two hundred eleven thousand, one hundred fifty-six".