31520420534055 has 16 divisors (see below), whose sum is σ = 50643688227840. Its totient is φ = 16740552493728.

The previous prime is 31520420534041. The next prime is 31520420534063. The reversal of 31520420534055 is 55043502402513.

It is not a de Polignac number, because 31520420534055 - 2¹⁵ = 31520420501287 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4396149907 + ... + 4396157076.

It is an arithmetic number, because the mean of its divisors is an integer number (3165230514240).

Almost surely, 2^{31520420534055} is an apocalyptic number.

31520420534055 is a deficient number, since it is larger than the sum of its proper divisors (19123267693785).

31520420534055 is a wasteful number, since it uses less digits than its factorization.

31520420534055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8792307230.

The product of its (nonzero) digits is 360000, while the sum is 39.

Adding to 31520420534055 its reverse (55043502402513), we get a palindrome (86563922936568).

The spelling of 31520420534055 in words is "thirty-one trillion, five hundred twenty billion, four hundred twenty million, five hundred thirty-four thousand, fifty-five".