31242003135405 has 128 divisors (see below), whose sum is σ = 56248186060800. Its totient is φ = 14733769881600.

The previous prime is 31242003135397. The next prime is 31242003135437. The reversal of 31242003135405 is 50453130024213.

It is not a de Polignac number, because 31242003135405 - 2³ = 31242003135397 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 242571225 + ... + 242699985.

It is an arithmetic number, because the mean of its divisors is an integer number (439438953600).

Almost surely, 2^{31242003135405} is an apocalyptic number.

It is an amenable number.

31242003135405 is a deficient number, since it is larger than the sum of its proper divisors (25006182925395).

31242003135405 is a wasteful number, since it uses less digits than its factorization.

31242003135405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129795.

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

Adding to 31242003135405 its reverse (50453130024213), we get a palindrome (81695133159618).

The spelling of 31242003135405 in words is "thirty-one trillion, two hundred forty-two billion, three million, one hundred thirty-five thousand, four hundred five".