213110891 has 16 divisors (see below), whose sum is σ = 249024000. Its totient is φ = 178599168.

The previous prime is 213110869. The next prime is 213110903. The reversal of 213110891 is 198011312.

It is a cyclic number.

It is not a de Polignac number, because 213110891 - 2¹⁸ = 212848747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213110891.

It is not an unprimeable number, because it can be changed into a prime (213110291) 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, 80891 + ... + 83483.

It is an arithmetic number, because the mean of its divisors is an integer number (15564000).

Almost surely, 2^213110891 is an apocalyptic number.

213110891 is a deficient number, since it is larger than the sum of its proper divisors (35913109).

213110891 is a wasteful number, since it uses less digits than its factorization.

213110891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 213110891 is about 14598.3180880538. The cubic root of 213110891 is about 597.3128827072.

The spelling of 213110891 in words is "two hundred thirteen million, one hundred ten thousand, eight hundred ninety-one".