20031232231031 has 8 divisors (see below), whose sum is σ = 22894037262624. Its totient is φ = 17168727306240.

The previous prime is 20031232230941. The next prime is 20031232231051. The reversal of 20031232231031 is 13013223213002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20031232231031 is a prime.

It is a super-2 number, since 2×20031232231031² (a number of 27 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 = 20031232230988 and 20031232231006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031232231051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74883650 + ... + 75150671.

It is an arithmetic number, because the mean of its divisors is an integer number (2861754657828).

Almost surely, 2^{20031232231031} is an apocalyptic number.

20031232231031 is a deficient number, since it is larger than the sum of its proper divisors (2862805031593).

20031232231031 is a wasteful number, since it uses less digits than its factorization.

20031232231031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150053401.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20031232231031 its reverse (13013223213002), we get a palindrome (33044455444033).

The spelling of 20031232231031 in words is "twenty trillion, thirty-one billion, two hundred thirty-two million, two hundred thirty-one thousand, thirty-one".