20130231131 has 12 divisors (see below), whose sum is σ = 22509497880. Its totient is φ = 17948931840.

The previous prime is 20130231091. The next prime is 20130231133. The reversal of 20130231131 is 13113203102.

It is a de Polignac number, because none of the positive numbers 2^k-20130231131 is a prime.

It is a super-2 number, since 2×20130231131² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20130231133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1827530 + ... + 1838511.

It is an arithmetic number, because the mean of its divisors is an integer number (1875791490).

Almost surely, 2^20130231131 is an apocalyptic number.

20130231131 is a deficient number, since it is larger than the sum of its proper divisors (2379266749).

20130231131 is a wasteful number, since it uses less digits than its factorization.

20130231131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3666094 (or 3666077 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20130231131 its reverse (13113203102), we get a palindrome (33243434233).

The spelling of 20130231131 in words is "twenty billion, one hundred thirty million, two hundred thirty-one thousand, one hundred thirty-one".