31313220230 has 16 divisors (see below), whose sum is σ = 56366175024. Its totient is φ = 12524759520.

The previous prime is 31313220217. The next prime is 31313220251. The reversal of 31313220230 is 3202231313.

It is a super-2 number, since 2×31313220230² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258809 + ... + 360011.

It is an arithmetic number, because the mean of its divisors is an integer number (3522885939).

Almost surely, 2^31313220230 is an apocalyptic number.

31313220230 is a deficient number, since it is larger than the sum of its proper divisors (25052954794).

31313220230 is a wasteful number, since it uses less digits than its factorization.

31313220230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132151.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31313220230 its reverse (3202231313), we get a palindrome (34515451543).

The spelling of 31313220230 in words is "thirty-one billion, three hundred thirteen million, two hundred twenty thousand, two hundred thirty".