31200320330 has 8 divisors (see below), whose sum is σ = 56160576612. Its totient is φ = 12480128128.

The previous prime is 31200320323. The next prime is 31200320381. The reversal of 31200320330 is 3302300213.

It can be written as a sum of positive squares in 2 ways, for example, as 30386416489 + 813903841 = 174317^2 + 28529^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31200320330² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31200320299 and 31200320308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1560016007 + ... + 1560016026.

Almost surely, 2^31200320330 is an apocalyptic number.

31200320330 is a deficient number, since it is larger than the sum of its proper divisors (24960256282).

31200320330 is a wasteful number, since it uses less digits than its factorization.

31200320330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120032040.

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 31200320330 its reverse (3302300213), we get a palindrome (34502620543).

The spelling of 31200320330 in words is "thirty-one billion, two hundred million, three hundred twenty thousand, three hundred thirty".