213287886 has 36 divisors (see below), whose sum is σ = 537574752. Its totient is φ = 60939144.

The previous prime is 213287849. The next prime is 213287897. The reversal of 213287886 is 688782312.

213287886 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 120030 + ... + 121793.

It is an arithmetic number, because the mean of its divisors is an integer number (14932632).

Almost surely, 2^213287886 is an apocalyptic number.

213287886 is an abundant number, since it is smaller than the sum of its proper divisors (324286866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213287886 is a wasteful number, since it uses less digits than its factorization.

213287886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241845 (or 241835 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 213287886 is about 14604.3790008340. The cubic root of 213287886 is about 597.4781990493.

The spelling of 213287886 in words is "two hundred thirteen million, two hundred eighty-seven thousand, eight hundred eighty-six".