31301020031 has 8 divisors (see below), whose sum is σ = 31380940800. Its totient is φ = 31221139320.

The previous prime is 31301019977. The next prime is 31301020039. The reversal of 31301020031 is 13002010313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31301020031 is a prime.

It is a super-2 number, since 2×31301020031² (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 = 31301019988 and 31301020015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301020039) 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, 2113430 + ... + 2128188.

It is an arithmetic number, because the mean of its divisors is an integer number (3922617600).

Almost surely, 2^31301020031 is an apocalyptic number.

31301020031 is a deficient number, since it is larger than the sum of its proper divisors (79920769).

31301020031 is a wasteful number, since it uses less digits than its factorization.

31301020031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20029.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 31301020031 its reverse (13002010313), we get a palindrome (44303030344).

The spelling of 31301020031 in words is "thirty-one billion, three hundred one million, twenty thousand, thirty-one".