2131229 has 4 divisors (see below), whose sum is σ = 2136000. Its totient is φ = 2126460.

The previous prime is 2131223. The next prime is 2131231. The reversal of 2131229 is 9221312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2131229 - 2¹² = 2127133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2131229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131223) 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, 1637 + ... + 2634.

It is an arithmetic number, because the mean of its divisors is an integer number (534000).

2^2131229 is an apocalyptic number.

It is an amenable number.

2131229 is a deficient number, since it is larger than the sum of its proper divisors (4771).

2131229 is an equidigital number, since it uses as much as digits as its factorization.

2131229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4770.

The product of its digits is 216, while the sum is 20.

The square root of 2131229 is about 1459.8729396766. The cubic root of 2131229 is about 128.6895766997.

The spelling of 2131229 in words is "two million, one hundred thirty-one thousand, two hundred twenty-nine".