31242030031 has 2 divisors, whose sum is σ = 31242030032. Its totient is φ = 31242030030.

The previous prime is 31242030019. The next prime is 31242030073. The reversal of 31242030031 is 13003024213.

It is a weak prime.

It is an emirp because it is prime and its reverse (13003024213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31242030031 - 2¹¹ = 31242027983 is a prime.

It is a super-2 number, since 2×31242030031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31242029990 and 31242030008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31242030431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15621015015 + 15621015016.

It is an arithmetic number, because the mean of its divisors is an integer number (15621015016).

Almost surely, 2^31242030031 is an apocalyptic number.

31242030031 is a deficient number, since it is larger than the sum of its proper divisors (1).

31242030031 is an equidigital number, since it uses as much as digits as its factorization.

31242030031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31242030031 its reverse (13003024213), we get a palindrome (44245054244).

The spelling of 31242030031 in words is "thirty-one billion, two hundred forty-two million, thirty thousand, thirty-one".