31345140533 has 4 divisors (see below), whose sum is σ = 35823017760. Its totient is φ = 26867263308.

The previous prime is 31345140529. The next prime is 31345140539. The reversal of 31345140533 is 33504154313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33504154313 = 7 ⋅4786307759.

It is a cyclic number.

It is not a de Polignac number, because 31345140533 - 2² = 31345140529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31345140533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31345140539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2238938603 + ... + 2238938616.

It is an arithmetic number, because the mean of its divisors is an integer number (8955754440).

Almost surely, 2^31345140533 is an apocalyptic number.

It is an amenable number.

31345140533 is a deficient number, since it is larger than the sum of its proper divisors (4477877227).

31345140533 is an equidigital number, since it uses as much as digits as its factorization.

31345140533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4477877226.

The product of its (nonzero) digits is 32400, while the sum is 32.

Adding to 31345140533 its reverse (33504154313), we get a palindrome (64849294846).

The spelling of 31345140533 in words is "thirty-one billion, three hundred forty-five million, one hundred forty thousand, five hundred thirty-three".