31101031131 has 8 divisors (see below), whose sum is σ = 41470820160. Its totient is φ = 20732631432.

The previous prime is 31101031103. The next prime is 31101031141. The reversal of 31101031131 is 13113010113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31101031131 - 2⁶ = 31101031067 is a prime.

It is a super-2 number, since 2×31101031131² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31101031131.

It is not an unprimeable number, because it can be changed into a prime (31101031141) 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 7 ways as a sum of consecutive naturals, for example, 293925 + ... + 385478.

It is an arithmetic number, because the mean of its divisors is an integer number (5183852520).

Almost surely, 2^31101031131 is an apocalyptic number.

31101031131 is a deficient number, since it is larger than the sum of its proper divisors (10369789029).

31101031131 is a wasteful number, since it uses less digits than its factorization.

31101031131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694665.

The product of its (nonzero) digits is 27, while the sum is 15.

Adding to 31101031131 its reverse (13113010113), we get a palindrome (44214041244).

The spelling of 31101031131 in words is "thirty-one billion, one hundred one million, thirty-one thousand, one hundred thirty-one".