31313220430 has 8 divisors (see below), whose sum is σ = 56363796792. Its totient is φ = 12525288168.

The previous prime is 31313220401. The next prime is 31313220443. The reversal of 31313220430 is 3402231313.

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

It is a congruent number.

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, 1565661012 + ... + 1565661031.

It is an arithmetic number, because the mean of its divisors is an integer number (7045474599).

Almost surely, 2^31313220430 is an apocalyptic number.

31313220430 is a deficient number, since it is larger than the sum of its proper divisors (25050576362).

31313220430 is a wasteful number, since it uses less digits than its factorization.

31313220430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131322050.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31313220430 its reverse (3402231313), we get a palindrome (34715451743).

The spelling of 31313220430 in words is "thirty-one billion, three hundred thirteen million, two hundred twenty thousand, four hundred thirty".