31520531425011 has 8 divisors (see below), whose sum is σ = 42079325020560. Its totient is φ = 20987712723072.

The previous prime is 31520531424997. The next prime is 31520531425039. The reversal of 31520531425011 is 11052413502513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31520531425011 - 2⁵ = 31520531424979 is a prime.

It is a super-3 number, since 3×31520531425011³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (31520531425111) 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 7 ways as a sum of consecutive naturals, for example, 6493720570 + ... + 6493725423.

It is an arithmetic number, because the mean of its divisors is an integer number (5259915627570).

Almost surely, 2^{31520531425011} is an apocalyptic number.

31520531425011 is a deficient number, since it is larger than the sum of its proper divisors (10558793595549).

31520531425011 is a wasteful number, since it uses less digits than its factorization.

31520531425011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12987446805.

The product of its (nonzero) digits is 18000, while the sum is 33.

Adding to 31520531425011 its reverse (11052413502513), we get a palindrome (42572944927524).

The spelling of 31520531425011 in words is "thirty-one trillion, five hundred twenty billion, five hundred thirty-one million, four hundred twenty-five thousand, eleven".