31323302331131 has 4 divisors (see below), whose sum is σ = 31504361882352. Its totient is φ = 31142242779912.

The previous prime is 31323302331037. The next prime is 31323302331157. The reversal of 31323302331131 is 13113320332313.

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

It is a cyclic number.

It is not a de Polignac number, because 31323302331131 - 2¹⁸ = 31323302068987 is a prime.

It is a super-2 number, since 2×31323302331131² (a number of 28 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 = 31323302331094 and 31323302331103.

It is not an unprimeable number, because it can be changed into a prime (31323302331631) 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, 90529775351 + ... + 90529775696.

It is an arithmetic number, because the mean of its divisors is an integer number (7876090470588).

Almost surely, 2^{31323302331131} is an apocalyptic number.

31323302331131 is a deficient number, since it is larger than the sum of its proper divisors (181059551221).

31323302331131 is a wasteful number, since it uses less digits than its factorization.

31323302331131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181059551220.

The product of its (nonzero) digits is 8748, while the sum is 29.

Adding to 31323302331131 its reverse (13113320332313), we get a palindrome (44436622663444).

The spelling of 31323302331131 in words is "thirty-one trillion, three hundred twenty-three billion, three hundred two million, three hundred thirty-one thousand, one hundred thirty-one".