203213210331031 has 4 divisors (see below), whose sum is σ = 203264436251392. Its totient is φ = 203161984410672.

The previous prime is 203213210331023. The next prime is 203213210331041. The reversal of 203213210331031 is 130133012312302.

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 203213210331031 - 2³ = 203213210331023 is a prime.

It is a super-2 number, since 2×203213210331031² (a number of 29 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 = 203213210330987 and 203213210331005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203213210331041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25612954230 + ... + 25612962163.

It is an arithmetic number, because the mean of its divisors is an integer number (50816109062848).

Almost surely, 2^{203213210331031} is an apocalyptic number.

203213210331031 is a deficient number, since it is larger than the sum of its proper divisors (51225920361).

203213210331031 is an equidigital number, since it uses as much as digits as its factorization.

203213210331031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51225920360.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 203213210331031 its reverse (130133012312302), we get a palindrome (333346222643333).

The spelling of 203213210331031 in words is "two hundred three trillion, two hundred thirteen billion, two hundred ten million, three hundred thirty-one thousand, thirty-one".