2031231 has 4 divisors (see below), whose sum is σ = 2708312. Its totient is φ = 1354152.

The previous prime is 2031229. The next prime is 2031251. The reversal of 2031231 is 1321302.

It is a happy number.

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

It is not a de Polignac number, because 2031231 - 2¹ = 2031229 is a prime.

It is a super-2 number, since 2×2031231² = 8251798750722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031251) 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, 338536 + ... + 338541.

It is an arithmetic number, because the mean of its divisors is an integer number (677078).

2^2031231 is an apocalyptic number.

2031231 is a deficient number, since it is larger than the sum of its proper divisors (677081).

2031231 is an equidigital number, since it uses as much as digits as its factorization.

2031231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677080.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 2031231 is about 1425.2126157174. The cubic root of 2031231 is about 126.6445306039.

Adding to 2031231 its reverse (1321302), we get a palindrome (3352533).

The spelling of 2031231 in words is "two million, thirty-one thousand, two hundred thirty-one".