31143535403405 has 32 divisors (see below), whose sum is σ = 38667617121408. Its totient is φ = 24061872441600.

The previous prime is 31143535403363. The next prime is 31143535403417. The reversal of 31143535403405 is 50430453534113.

It is not a de Polignac number, because 31143535403405 - 2¹² = 31143535399309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 13490570 + ... + 15629540.

It is an arithmetic number, because the mean of its divisors is an integer number (1208363035044).

Almost surely, 2^{31143535403405} is an apocalyptic number.

It is an amenable number.

31143535403405 is a deficient number, since it is larger than the sum of its proper divisors (7524081718003).

31143535403405 is a wasteful number, since it uses less digits than its factorization.

31143535403405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139597.

The product of its (nonzero) digits is 648000, while the sum is 41.

Adding to 31143535403405 its reverse (50430453534113), we get a palindrome (81573988937518).

The spelling of 31143535403405 in words is "thirty-one trillion, one hundred forty-three billion, five hundred thirty-five million, four hundred three thousand, four hundred five".