31103443031 has 8 divisors (see below), whose sum is σ = 31699772160. Its totient is φ = 30510999288.

The previous prime is 31103442989. The next prime is 31103443043. The reversal of 31103443031 is 13034430113.

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

It is a cyclic number.

It is not a de Polignac number, because 31103443031 - 2¹⁴ = 31103426647 is a prime.

It is a super-2 number, since 2×31103443031² (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 = 31103442988 and 31103443006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103443331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955181 + ... + 987206.

It is an arithmetic number, because the mean of its divisors is an integer number (3962471520).

Almost surely, 2^31103443031 is an apocalyptic number.

31103443031 is a deficient number, since it is larger than the sum of its proper divisors (596329129).

31103443031 is a wasteful number, since it uses less digits than its factorization.

31103443031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942693.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31103443031 its reverse (13034430113), we get a palindrome (44137873144).

The spelling of 31103443031 in words is "thirty-one billion, one hundred three million, four hundred forty-three thousand, thirty-one".