2031231129 has 4 divisors (see below), whose sum is σ = 2708308176. Its totient is φ = 1354154084.

The previous prime is 2031231127. The next prime is 2031231193. The reversal of 2031231129 is 9211321302.

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 2031231129 - 2¹ = 2031231127 is a prime.

It is a super-2 number, since 2×2031231129² = 8251799798837229282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2031231099 and 2031231108.

It is not an unprimeable number, because it can be changed into a prime (2031231121) 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, 338538519 + ... + 338538524.

It is an arithmetic number, because the mean of its divisors is an integer number (677077044).

Almost surely, 2^2031231129 is an apocalyptic number.

It is an amenable number.

2031231129 is a deficient number, since it is larger than the sum of its proper divisors (677077047).

2031231129 is an equidigital number, since it uses as much as digits as its factorization.

2031231129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677077046.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 2031231129 is about 45069.1815878656. The cubic root of 2031231129 is about 1266.4453328490.

The spelling of 2031231129 in words is "two billion, thirty-one million, two hundred thirty-one thousand, one hundred twenty-nine".