31523301321231 has 8 divisors (see below), whose sum is σ = 42031094516224. Its totient is φ = 21015521170200.

The previous prime is 31523301321229. The next prime is 31523301321263. The reversal of 31523301321231 is 13212310332513.

It is a happy number.

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

It is not a de Polignac number, because 31523301321231 - 2¹ = 31523301321229 is a prime.

It is a super-2 number, since 2×31523301321231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31523301321331) 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, 6908706 + ... + 10525056.

It is an arithmetic number, because the mean of its divisors is an integer number (5253886814528).

Almost surely, 2^{31523301321231} is an apocalyptic number.

31523301321231 is a deficient number, since it is larger than the sum of its proper divisors (10507793194993).

31523301321231 is a wasteful number, since it uses less digits than its factorization.

31523301321231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6521981.

The product of its (nonzero) digits is 9720, while the sum is 30.

Adding to 31523301321231 its reverse (13212310332513), we get a palindrome (44735611653744).

The spelling of 31523301321231 in words is "thirty-one trillion, five hundred twenty-three billion, three hundred one million, three hundred twenty-one thousand, two hundred thirty-one".