31003413431 has 8 divisors (see below), whose sum is σ = 32418938880. Its totient is φ = 29593517272.

The previous prime is 31003413403. The next prime is 31003413439. The reversal of 31003413431 is 13431430013.

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

It is not a de Polignac number, because 31003413431 - 2²² = 30999219127 is a prime.

It is a super-2 number, since 2×31003413431² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31003413397 and 31003413406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31003413439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1396055 + ... + 1418088.

It is an arithmetic number, because the mean of its divisors is an integer number (4052367360).

Almost surely, 2^31003413431 is an apocalyptic number.

31003413431 is a deficient number, since it is larger than the sum of its proper divisors (1415525449).

31003413431 is a wasteful number, since it uses less digits than its factorization.

31003413431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814645.

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

Adding to 31003413431 its reverse (13431430013), we get a palindrome (44434843444).

The spelling of 31003413431 in words is "thirty-one billion, three million, four hundred thirteen thousand, four hundred thirty-one".