231303132131 has 4 divisors (see below), whose sum is σ = 233548793712. Its totient is φ = 229057470552.

The previous prime is 231303132113. The next prime is 231303132211. The reversal of 231303132131 is 131231303132.

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-231303132131 is a prime.

It is a super-2 number, since 2×231303132131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231303132097 and 231303132106.

It is not an unprimeable number, because it can be changed into a prime (231303132331) 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, 1122830636 + ... + 1122830841.

It is an arithmetic number, because the mean of its divisors is an integer number (58387198428).

Almost surely, 2^231303132131 is an apocalyptic number.

231303132131 is a deficient number, since it is larger than the sum of its proper divisors (2245661581).

231303132131 is a wasteful number, since it uses less digits than its factorization.

231303132131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245661580.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 231303132131 its reverse (131231303132), we get a palindrome (362534435263).

The spelling of 231303132131 in words is "two hundred thirty-one billion, three hundred three million, one hundred thirty-two thousand, one hundred thirty-one".