31520420534043 has 12 divisors (see below), whose sum is σ = 52033710088048. Its totient is φ = 18011668876560.

The previous prime is 31520420534041. The next prime is 31520420534063. The reversal of 31520420534043 is 34043502402513.

31520420534043 is a `hidden beast` number, since 3 + 1 + 520 + 4 + 2 + 0 + 53 + 40 + 43 = 666.

It is not a de Polignac number, because 31520420534043 - 2¹ = 31520420534041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31520420533989 and 31520420534007.

It is not an unprimeable number, because it can be changed into a prime (31520420534041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250162067668 + ... + 250162067793.

Almost surely, 2^{31520420534043} is an apocalyptic number.

31520420534043 is a deficient number, since it is larger than the sum of its proper divisors (20513289554005).

31520420534043 is a wasteful number, since it uses less digits than its factorization.

31520420534043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500324135474 (or 500324135471 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

Adding to 31520420534043 its reverse (34043502402513), we get a palindrome (65563922936556).

The spelling of 31520420534043 in words is "thirty-one trillion, five hundred twenty billion, four hundred twenty million, five hundred thirty-four thousand, forty-three".