31230223040 has 28 divisors (see below), whose sum is σ = 74366969376. Its totient is φ = 12492089088.

The previous prime is 31230223039. The next prime is 31230223043. The reversal of 31230223040 is 4032203213.

It is a super-2 number, since 2×31230223040² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (31230223043) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 48796904 + ... + 48797543.

It is an arithmetic number, because the mean of its divisors is an integer number (2655963192).

Almost surely, 2^31230223040 is an apocalyptic number.

It is an amenable number.

31230223040 is an abundant number, since it is smaller than the sum of its proper divisors (43136746336).

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

31230223040 is an equidigital number, since it uses as much as digits as its factorization.

31230223040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97594464 (or 97594454 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 31230223040 its reverse (4032203213), we get a palindrome (35262426253).

The spelling of 31230223040 in words is "thirty-one billion, two hundred thirty million, two hundred twenty-three thousand, forty".