31323233032 has 128 divisors (see below), whose sum is σ = 75642255360. Its totient is φ = 11826984960.

The previous prime is 31323232991. The next prime is 31323233107. The reversal of 31323233032 is 23033232313.

It is a super-2 number, since 2×31323233032² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31323232988 and 31323233006.

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, 1637958 + ... + 1656970.

It is an arithmetic number, because the mean of its divisors is an integer number (590955120).

Almost surely, 2^31323233032 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 31323233032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37821127680).

31323233032 is an abundant number, since it is smaller than the sum of its proper divisors (44319022328).

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

31323233032 is a wasteful number, since it uses less digits than its factorization.

31323233032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19143 (or 19139 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 25.

Adding to 31323233032 its reverse (23033232313), we get a palindrome (54356465345).

The spelling of 31323233032 in words is "thirty-one billion, three hundred twenty-three million, two hundred thirty-three thousand, thirty-two".