31300221131 has 4 divisors (see below), whose sum is σ = 31300937712. Its totient is φ = 31299504552.

The previous prime is 31300221089. The next prime is 31300221181. The reversal of 31300221131 is 13112200313.

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-31300221131 is a prime.

It is a super-2 number, since 2×31300221131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31300221181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288200 + ... + 381653.

It is an arithmetic number, because the mean of its divisors is an integer number (7825234428).

Almost surely, 2^31300221131 is an apocalyptic number.

31300221131 is a deficient number, since it is larger than the sum of its proper divisors (716581).

31300221131 is an equidigital number, since it uses as much as digits as its factorization.

31300221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716580.

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

Adding to 31300221131 its reverse (13112200313), we get a palindrome (44412421444).

The spelling of 31300221131 in words is "thirty-one billion, three hundred million, two hundred twenty-one thousand, one hundred thirty-one".