31012032031 has 4 divisors (see below), whose sum is σ = 31027023000. Its totient is φ = 30997041064.

The previous prime is 31012032017. The next prime is 31012032049. The reversal of 31012032031 is 13023021013.

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 31012032031 - 2⁷ = 31012031903 is a prime.

It is a super-2 number, since 2×31012032031² (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 = 31012031996 and 31012032014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012032001) 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, 7492381 + ... + 7496518.

It is an arithmetic number, because the mean of its divisors is an integer number (7756755750).

Almost surely, 2^31012032031 is an apocalyptic number.

31012032031 is a deficient number, since it is larger than the sum of its proper divisors (14990969).

31012032031 is a wasteful number, since it uses less digits than its factorization.

31012032031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14990968.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31012032031 its reverse (13023021013), we get a palindrome (44035053044).

The spelling of 31012032031 in words is "thirty-one billion, twelve million, thirty-two thousand, thirty-one".