31031131100103 has 48 divisors (see below), whose sum is σ = 45323173074816. Its totient is φ = 20457172572480.

The previous prime is 31031131100051. The next prime is 31031131100143. The reversal of 31031131100103 is 30100113113013.

31031131100103 is a `hidden beast` number, since 31 + 0 + 311 + 311 + 0 + 0 + 10 + 3 = 666.

It is not a de Polignac number, because 31031131100103 - 2¹⁶ = 31031131034567 is a prime.

It is a super-2 number, since 2×31031131100103² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031131100143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2404202976 + ... + 2404215882.

It is an arithmetic number, because the mean of its divisors is an integer number (944232772392).

Almost surely, 2^{31031131100103} is an apocalyptic number.

31031131100103 is a deficient number, since it is larger than the sum of its proper divisors (14292041974713).

31031131100103 is a wasteful number, since it uses less digits than its factorization.

31031131100103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17324 (or 17321 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 18.

Adding to 31031131100103 its reverse (30100113113013), we get a palindrome (61131244213116).

The spelling of 31031131100103 in words is "thirty-one trillion, thirty-one billion, one hundred thirty-one million, one hundred thousand, one hundred three".