2031020131 has 4 divisors (see below), whose sum is σ = 2321165872. Its totient is φ = 1740874392.

The previous prime is 2031020119. The next prime is 2031020137. The reversal of 2031020131 is 1310201302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2031020131 is a prime.

It is a super-2 number, since 2×2031020131² = 8250085545054514322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2031020137) 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, 145072860 + ... + 145072873.

It is an arithmetic number, because the mean of its divisors is an integer number (580291468).

Almost surely, 2^2031020131 is an apocalyptic number.

2031020131 is a deficient number, since it is larger than the sum of its proper divisors (290145741).

2031020131 is an equidigital number, since it uses as much as digits as its factorization.

2031020131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290145740.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2031020131 is about 45066.8407035594. The cubic root of 2031020131 is about 1266.4014798573.

Adding to 2031020131 its reverse (1310201302), we get a palindrome (3341221433).

The spelling of 2031020131 in words is "two billion, thirty-one million, twenty thousand, one hundred thirty-one".