31231132102031 has 8 divisors (see below), whose sum is σ = 31582638540960. Its totient is φ = 30880554347232.

The previous prime is 31231132101991. The next prime is 31231132102061. The reversal of 31231132102031 is 13020123113213.

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-31231132102031 is a prime.

It is a super-2 number, since 2×31231132102031² (a number of 28 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 = 31231132101988 and 31231132102006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231132102061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232103396 + ... + 232237913.

It is an arithmetic number, because the mean of its divisors is an integer number (3947829817620).

Almost surely, 2^{31231132102031} is an apocalyptic number.

31231132102031 is a deficient number, since it is larger than the sum of its proper divisors (351506438929).

31231132102031 is a wasteful number, since it uses less digits than its factorization.

31231132102031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464342065.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31231132102031 its reverse (13020123113213), we get a palindrome (44251255215244).

The spelling of 31231132102031 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred thirty-two million, one hundred two thousand, thirty-one".