31000442430 has 32 divisors (see below), whose sum is σ = 75168090144. Its totient is φ = 8181559296.

The previous prime is 31000442413. The next prime is 31000442443. The reversal of 31000442430 is 3424400013.

It is a super-2 number, since 2×31000442430² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31000442397 and 31000442406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5323627 + ... + 5329446.

It is an arithmetic number, because the mean of its divisors is an integer number (2349002817).

Almost surely, 2^31000442430 is an apocalyptic number.

31000442430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31000442430 is an abundant number, since it is smaller than the sum of its proper divisors (44167647714).

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

31000442430 is a wasteful number, since it uses less digits than its factorization.

31000442430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10653180.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 31000442430 its reverse (3424400013), we get a palindrome (34424842443).

The spelling of 31000442430 in words is "thirty-one billion, four hundred forty-two thousand, four hundred thirty".