31304444430 has 32 divisors (see below), whose sum is σ = 85863619584. Its totient is φ = 7155301536.

The previous prime is 31304444417. The next prime is 31304444449. The reversal of 31304444430 is 3444440313.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 15 ways as a sum of consecutive naturals, for example, 74534182 + ... + 74534601.

It is an arithmetic number, because the mean of its divisors is an integer number (2683238112).

Almost surely, 2^31304444430 is an apocalyptic number.

31304444430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31304444430 is an abundant number, since it is smaller than the sum of its proper divisors (54559175154).

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

31304444430 is a wasteful number, since it uses less digits than its factorization.

31304444430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149068800.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 31304444430 its reverse (3444440313), we get a palindrome (34748884743).

The spelling of 31304444430 in words is "thirty-one billion, three hundred four million, four hundred forty-four thousand, four hundred thirty".