31305403231540 has 24 divisors (see below), whose sum is σ = 69201417670560. Its totient is φ = 11863100171808.

The previous prime is 31305403231523. The next prime is 31305403231589. The reversal of 31305403231540 is 4513230450313.

It is a junction number, because it is equal to n+sod(n) for n = 31305403231496 and 31305403231505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41191319662 + ... + 41191320421.

It is an arithmetic number, because the mean of its divisors is an integer number (2883392402940).

Almost surely, 2^{31305403231540} is an apocalyptic number.

It is an amenable number.

31305403231540 is an abundant number, since it is smaller than the sum of its proper divisors (37896014439020).

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

31305403231540 is a wasteful number, since it uses less digits than its factorization.

31305403231540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82382640111 (or 82382640109 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 34.

Adding to 31305403231540 its reverse (4513230450313), we get a palindrome (35818633681853).

The spelling of 31305403231540 in words is "thirty-one trillion, three hundred five billion, four hundred three million, two hundred thirty-one thousand, five hundred forty".