31440230039 has 32 divisors (see below), whose sum is σ = 34284429312. Its totient is φ = 28763424000.

The previous prime is 31440230033. The next prime is 31440230047. The reversal of 31440230039 is 93003204413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31440230039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31440229993 and 31440230020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440230033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12743084 + ... + 12745550.

It is an arithmetic number, because the mean of its divisors is an integer number (1071388416).

Almost surely, 2^31440230039 is an apocalyptic number.

31440230039 is a deficient number, since it is larger than the sum of its proper divisors (2844199273).

31440230039 is a wasteful number, since it uses less digits than its factorization.

31440230039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847.

The product of its (nonzero) digits is 7776, while the sum is 29.

The spelling of 31440230039 in words is "thirty-one billion, four hundred forty million, two hundred thirty thousand, thirty-nine".