2031313129 has 4 divisors (see below), whose sum is σ = 2032622676. Its totient is φ = 2030003584.

The previous prime is 2031313121. The next prime is 2031313133. The reversal of 2031313129 is 9213131302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1054625625 + 976687504 = 32475^2 + 31252^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031313129 - 2³ = 2031313121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2031313121) 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, 652444 + ... + 655549.

It is an arithmetic number, because the mean of its divisors is an integer number (508155669).

Almost surely, 2^2031313129 is an apocalyptic number.

It is an amenable number.

2031313129 is a deficient number, since it is larger than the sum of its proper divisors (1309547).

2031313129 is a wasteful number, since it uses less digits than its factorization.

2031313129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309546.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 2031313129 is about 45070.0912912321. The cubic root of 2031313129 is about 1266.4623745860.

The spelling of 2031313129 in words is "two billion, thirty-one million, three hundred thirteen thousand, one hundred twenty-nine".