31523301321232 has 160 divisors (see below), whose sum is σ = 70755603851520. Its totient is φ = 13326814863360.

The previous prime is 31523301321229. The next prime is 31523301321263. The reversal of 31523301321232 is 23212310332513.

It is a junction number, because it is equal to n+sod(n) for n = 31523301321194 and 31523301321203.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1884342244 + ... + 1884358972.

It is an arithmetic number, because the mean of its divisors is an integer number (442222524072).

Almost surely, 2^{31523301321232} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31523301321232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35377801925760).

31523301321232 is an abundant number, since it is smaller than the sum of its proper divisors (39232302530288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31523301321232 is a wasteful number, since it uses less digits than its factorization.

31523301321232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17649 (or 17643 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 31523301321232 its reverse (23212310332513), we get a palindrome (54735611653745).

The spelling of 31523301321232 in words is "thirty-one trillion, five hundred twenty-three billion, three hundred one million, three hundred twenty-one thousand, two hundred thirty-two".