31135404523 has 8 divisors (see below), whose sum is σ = 31430140992. Its totient is φ = 30840737736.

The previous prime is 31135404479. The next prime is 31135404529. The reversal of 31135404523 is 32540453113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31135404523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31135404529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1499136 + ... + 1519762.

It is an arithmetic number, because the mean of its divisors is an integer number (3928767624).

Almost surely, 2^31135404523 is an apocalyptic number.

31135404523 is a deficient number, since it is larger than the sum of its proper divisors (294736469).

31135404523 is a wasteful number, since it uses less digits than its factorization.

31135404523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34841.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 31135404523 its reverse (32540453113), we get a palindrome (63675857636).

The spelling of 31135404523 in words is "thirty-one billion, one hundred thirty-five million, four hundred four thousand, five hundred twenty-three".