2102031231 has 4 divisors (see below), whose sum is σ = 2802708312. Its totient is φ = 1401354152.

The previous prime is 2102031223. The next prime is 2102031257. The reversal of 2102031231 is 1321302012.

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 2102031231 - 2³ = 2102031223 is a prime.

It is a super-2 number, since 2×2102031231² = 8837070592198750722, 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 2102031231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102031271) 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, 350338536 + ... + 350338541.

It is an arithmetic number, because the mean of its divisors is an integer number (700677078).

Almost surely, 2^2102031231 is an apocalyptic number.

2102031231 is a deficient number, since it is larger than the sum of its proper divisors (700677081).

2102031231 is an equidigital number, since it uses as much as digits as its factorization.

2102031231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700677080.

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

The square root of 2102031231 is about 45847.9141401220. The cubic root of 2102031231 is about 1280.9919132242.

Adding to 2102031231 its reverse (1321302012), we get a palindrome (3423333243).

The spelling of 2102031231 in words is "two billion, one hundred two million, thirty-one thousand, two hundred thirty-one".