31023313230 has 128 divisors (see below), whose sum is σ = 92169197568. Its totient is φ = 6507643392.

The previous prime is 31023313229. The next prime is 31023313241. The reversal of 31023313230 is 3231332013.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 31023313197 and 31023313206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 439447 + ... + 505133.

It is an arithmetic number, because the mean of its divisors is an integer number (720071856).

Almost surely, 2^31023313230 is an apocalyptic number.

31023313230 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 31023313230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46084598784).

31023313230 is an abundant number, since it is smaller than the sum of its proper divisors (61145884338).

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

31023313230 is a wasteful number, since it uses less digits than its factorization.

31023313230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65890.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 31023313230 its reverse (3231332013), we get a palindrome (34254645243).

The spelling of 31023313230 in words is "thirty-one billion, twenty-three million, three hundred thirteen thousand, two hundred thirty".