31545031125011 has 4 divisors (see below), whose sum is σ = 31710188356224. Its totient is φ = 31379873893800.

The previous prime is 31545031124989. The next prime is 31545031125029. The reversal of 31545031125011 is 11052113054513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31545031125011 - 2¹⁸ = 31545030862867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31545031125071) 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 3 ways as a sum of consecutive naturals, for example, 82578615320 + ... + 82578615701.

It is an arithmetic number, because the mean of its divisors is an integer number (7927547089056).

Almost surely, 2^{31545031125011} is an apocalyptic number.

31545031125011 is a deficient number, since it is larger than the sum of its proper divisors (165157231213).

31545031125011 is a wasteful number, since it uses less digits than its factorization.

31545031125011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165157231212.

The product of its (nonzero) digits is 9000, while the sum is 32.

Adding to 31545031125011 its reverse (11052113054513), we get a palindrome (42597144179524).

The spelling of 31545031125011 in words is "thirty-one trillion, five hundred forty-five billion, thirty-one million, one hundred twenty-five thousand, eleven".