31301303131 has 16 divisors (see below), whose sum is σ = 36542997504. Its totient is φ = 26252409024.

The previous prime is 31301303123. The next prime is 31301303161. The reversal of 31301303131 is 13130310313.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31301303131 - 2³ = 31301303123 is a prime.

It is a super-2 number, since 2×31301303131² (a number of 22 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 = 31301303099 and 31301303108.

It is not an unprimeable number, because it can be changed into a prime (31301303161) 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 15 ways as a sum of consecutive naturals, for example, 1725796 + ... + 1743838.

It is an arithmetic number, because the mean of its divisors is an integer number (2283937344).

Almost surely, 2^31301303131 is an apocalyptic number.

31301303131 is a deficient number, since it is larger than the sum of its proper divisors (5241694373).

31301303131 is a wasteful number, since it uses less digits than its factorization.

31301303131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23370.

The product of its (nonzero) digits is 243, while the sum is 19.

Adding to 31301303131 its reverse (13130310313), we get a palindrome (44431613444).

The spelling of 31301303131 in words is "thirty-one billion, three hundred one million, three hundred three thousand, one hundred thirty-one".