31320223230 has 16 divisors (see below), whose sum is σ = 75168535824. Its totient is φ = 8352059520.

The previous prime is 31320223229. The next prime is 31320223279. The reversal of 31320223230 is 3232202313.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31320223197 and 31320223206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522003691 + ... + 522003750.

It is an arithmetic number, because the mean of its divisors is an integer number (4698033489).

Almost surely, 2^31320223230 is an apocalyptic number.

31320223230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31320223230 is an abundant number, since it is smaller than the sum of its proper divisors (43848312594).

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

31320223230 is a wasteful number, since it uses less digits than its factorization.

31320223230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044007451.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 31320223230 its reverse (3232202313), we get a palindrome (34552425543).

The spelling of 31320223230 in words is "thirty-one billion, three hundred twenty million, two hundred twenty-three thousand, two hundred thirty".