31520420534103 has 16 divisors (see below), whose sum is σ = 44506179500256. Its totient is φ = 19774513310720.

The previous prime is 31520420534101. The next prime is 31520420534189. The reversal of 31520420534103 is 30143502402513.

It is a cyclic number.

It is not a de Polignac number, because 31520420534103 - 2¹ = 31520420534101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31520420534101) 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, 46621326 + ... + 47292587.

It is an arithmetic number, because the mean of its divisors is an integer number (2781636218766).

Almost surely, 2^{31520420534103} is an apocalyptic number.

31520420534103 is a deficient number, since it is larger than the sum of its proper divisors (12985758966153).

31520420534103 is a wasteful number, since it uses less digits than its factorization.

31520420534103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93920514.

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 31520420534103 its reverse (30143502402513), we get a palindrome (61663922936616).

The spelling of 31520420534103 in words is "thirty-one trillion, five hundred twenty billion, four hundred twenty million, five hundred thirty-four thousand, one hundred three".