31102113031 has 4 divisors (see below), whose sum is σ = 33929577864. Its totient is φ = 28274648200.

The previous prime is 31102113017. The next prime is 31102113041. The reversal of 31102113031 is 13031120113.

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 31102113031 - 2⁷ = 31102112903 is a prime.

It is a super-2 number, since 2×31102113031² (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 = 31102112996 and 31102113014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31102113001) 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, 1413732400 + ... + 1413732421.

It is an arithmetic number, because the mean of its divisors is an integer number (8482394466).

Almost surely, 2^31102113031 is an apocalyptic number.

31102113031 is a deficient number, since it is larger than the sum of its proper divisors (2827464833).

31102113031 is a wasteful number, since it uses less digits than its factorization.

31102113031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2827464832.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31102113031 its reverse (13031120113), we get a palindrome (44133233144).

The spelling of 31102113031 in words is "thirty-one billion, one hundred two million, one hundred thirteen thousand, thirty-one".