2106231 has 4 divisors (see below), whose sum is σ = 2808312. Its totient is φ = 1404152.

The previous prime is 2106229. The next prime is 2106239. The reversal of 2106231 is 1326012.

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

It is a cyclic number.

It is not a de Polignac number, because 2106231 - 2¹ = 2106229 is a prime.

It is a super-2 number, since 2×2106231² = 8872418050722, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 2106231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106239) 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, 351036 + ... + 351041.

It is an arithmetic number, because the mean of its divisors is an integer number (702078).

2^2106231 is an apocalyptic number.

2106231 is a deficient number, since it is larger than the sum of its proper divisors (702081).

2106231 is an equidigital number, since it uses as much as digits as its factorization.

2106231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702080.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2106231 is about 1451.2859814661. The cubic root of 2106231 is about 128.1844468140.

It can be divided in two parts, 210 and 6231, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 2106231 in words is "two million, one hundred six thousand, two hundred thirty-one".