210031000000031 has 16 divisors (see below), whose sum is σ = 250558211119104. Its totient is φ = 172139888241024.

The previous prime is 210030999999941. The next prime is 210031000000033. The reversal of 210031000000031 is 130000000130012.

It is a cyclic number.

It is not a de Polignac number, because 210031000000031 - 2²⁶ = 210030932891167 is a prime.

It is a super-2 number, since 2×210031000000031² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210030999999949 and 210031000000021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210031000000033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224687255 + ... + 225620088.

It is an arithmetic number, because the mean of its divisors is an integer number (15659888194944).

Almost surely, 2^{210031000000031} is an apocalyptic number.

210031000000031 is a deficient number, since it is larger than the sum of its proper divisors (40527211119073).

210031000000031 is a wasteful number, since it uses less digits than its factorization.

210031000000031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450310270.

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 210031000000031 its reverse (130000000130012), we get a palindrome (340031000130043).

The spelling of 210031000000031 in words is "two hundred ten trillion, thirty-one billion, thirty-one", and thus it is an aban number.