31730031745 has 16 divisors (see below), whose sum is σ = 39061788480. Its totient is φ = 24729897024.

The previous prime is 31730031743. The next prime is 31730031757. The reversal of 31730031745 is 54713003713.

It is a cyclic number.

It is not a de Polignac number, because 31730031745 - 2¹ = 31730031743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31730031745.

It is not an unprimeable number, because it can be changed into a prime (31730031743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106059 + ... + 273328.

It is an arithmetic number, because the mean of its divisors is an integer number (2441361780).

Almost surely, 2^31730031745 is an apocalyptic number.

It is an amenable number.

31730031745 is a deficient number, since it is larger than the sum of its proper divisors (7331756735).

31730031745 is a wasteful number, since it uses less digits than its factorization.

31730031745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379824.

The product of its (nonzero) digits is 26460, while the sum is 34.

The spelling of 31730031745 in words is "thirty-one billion, seven hundred thirty million, thirty-one thousand, seven hundred forty-five".