31232132231 has 4 divisors (see below), whose sum is σ = 31292079264. Its totient is φ = 31172185200.

The previous prime is 31232132219. The next prime is 31232132237. The reversal of 31232132231 is 13223123213.

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 31232132231 - 2²² = 31227937927 is a prime.

It is a super-2 number, since 2×31232132231² (a number of 22 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 = 31232132197 and 31232132206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31232132237) 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, 29972735 + ... + 29973776.

It is an arithmetic number, because the mean of its divisors is an integer number (7823019816).

Almost surely, 2^31232132231 is an apocalyptic number.

31232132231 is a deficient number, since it is larger than the sum of its proper divisors (59947033).

31232132231 is an equidigital number, since it uses as much as digits as its factorization.

31232132231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59947032.

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

Adding to 31232132231 its reverse (13223123213), we get a palindrome (44455255444).

The spelling of 31232132231 in words is "thirty-one billion, two hundred thirty-two million, one hundred thirty-two thousand, two hundred thirty-one".