211113231 has 16 divisors (see below), whose sum is σ = 330392064. Its totient is φ = 117375264.

The previous prime is 211113167. The next prime is 211113263. The reversal of 211113231 is 132311112.

It is a happy number.

211113231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211113231 - 2⁶ = 211113167 is a prime.

It is a super-2 number, since 2×211113231² = 89137592606518722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211113231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211113631) 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, 135075 + ... + 136628.

It is an arithmetic number, because the mean of its divisors is an integer number (20649504).

Almost surely, 2^211113231 is an apocalyptic number.

211113231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211113231 is a deficient number, since it is larger than the sum of its proper divisors (119278833).

211113231 is a wasteful number, since it uses less digits than its factorization.

211113231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271750.

The product of its digits is 36, while the sum is 15.

The square root of 211113231 is about 14529.7360953322. The cubic root of 211113231 is about 595.4406556108.

Adding to 211113231 its reverse (132311112), we get a palindrome (343424343).

It can be divided in two parts, 21111 and 3231, that added together give a palindrome (24342).

The spelling of 211113231 in words is "two hundred eleven million, one hundred thirteen thousand, two hundred thirty-one".