31313023230 has 64 divisors (see below), whose sum is σ = 75610423296. Its totient is φ = 8299200000.

The previous prime is 31313023229. The next prime is 31313023309. The reversal of 31313023230 is 3232031313.

It is a junction number, because it is equal to n+sod(n) for n = 31313023197 and 31313023206.

It is a congruent number.

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, 11177830 + ... + 11180630.

It is an arithmetic number, because the mean of its divisors is an integer number (1181412864).

Almost surely, 2^31313023230 is an apocalyptic number.

31313023230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31313023230 is an abundant number, since it is smaller than the sum of its proper divisors (44297400066).

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

31313023230 is a wasteful number, since it uses less digits than its factorization.

31313023230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4953.

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

Adding to 31313023230 its reverse (3232031313), we get a palindrome (34545054543).

The spelling of 31313023230 in words is "thirty-one billion, three hundred thirteen million, twenty-three thousand, two hundred thirty".