31322112030 has 144 divisors (see below), whose sum is σ = 91597025520. Its totient is φ = 7416541440.

The previous prime is 31322112023. The next prime is 31322112037. The reversal of 31322112030 is 3021122313.

It is an interprime number because it is at equal distance from previous prime (31322112023) and next prime (31322112037).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31322111994 and 31322112012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322112037) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 434826 + ... + 501714.

It is an arithmetic number, because the mean of its divisors is an integer number (636090455).

Almost surely, 2^31322112030 is an apocalyptic number.

31322112030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31322112030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45798512760).

31322112030 is an abundant number, since it is smaller than the sum of its proper divisors (60274913490).

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

31322112030 is a wasteful number, since it uses less digits than its factorization.

31322112030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66967 (or 66953 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31322112030 its reverse (3021122313), we get a palindrome (34343234343).

The spelling of 31322112030 in words is "thirty-one billion, three hundred twenty-two million, one hundred twelve thousand, thirty".