87211306 has 32 divisors (see below), whose sum is σ = 161965440. Its totient is φ = 34295616.

The previous prime is 87211303. The next prime is 87211307. The reversal of 87211306 is 60311278.

It is not an unprimeable number, because it can be changed into a prime (87211303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31240 + ... + 33916.

It is an arithmetic number, because the mean of its divisors is an integer number (5061420).

Almost surely, 2^87211306 is an apocalyptic number.

87211306 is a deficient number, since it is larger than the sum of its proper divisors (74754134).

87211306 is a wasteful number, since it uses less digits than its factorization.

87211306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 87211306 is about 9338.6993741099. The cubic root of 87211306 is about 443.4632104201.

Subtracting from 87211306 its sum of digits (28), we obtain a palindrome (87211278).

The spelling of 87211306 in words is "eighty-seven million, two hundred eleven thousand, three hundred six".