213331000031 has 2 divisors, whose sum is σ = 213331000032. Its totient is φ = 213331000030.

The previous prime is 213330999949. The next prime is 213331000037. The reversal of 213331000031 is 130000133312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213331000031 is a prime.

It is a super-2 number, since 2×213331000031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213330999973 and 213331000009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213331000037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106665500015 + 106665500016.

It is an arithmetic number, because the mean of its divisors is an integer number (106665500016).

Almost surely, 2^213331000031 is an apocalyptic number.

213331000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

213331000031 is an equidigital number, since it uses as much as digits as its factorization.

213331000031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 213331000031 its reverse (130000133312), we get a palindrome (343331133343).

The spelling of 213331000031 in words is "two hundred thirteen billion, three hundred thirty-one million, thirty-one", and thus it is an aban number.