863213111 has 4 divisors (see below), whose sum is σ = 908645400. Its totient is φ = 817780824.

The previous prime is 863213081. The next prime is 863213123. The reversal of 863213111 is 111312368.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-863213111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863213311) 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, 22716116 + ... + 22716153.

It is an arithmetic number, because the mean of its divisors is an integer number (227161350).

Almost surely, 2^863213111 is an apocalyptic number.

863213111 is a deficient number, since it is larger than the sum of its proper divisors (45432289).

863213111 is a wasteful number, since it uses less digits than its factorization.

863213111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45432288.

The product of its digits is 864, while the sum is 26.

The square root of 863213111 is about 29380.4886106409. The cubic root of 863213111 is about 952.1513978876.

Adding to 863213111 its reverse (111312368), we get a palindrome (974525479).

The spelling of 863213111 in words is "eight hundred sixty-three million, two hundred thirteen thousand, one hundred eleven".