31213450042405 has 16 divisors (see below), whose sum is σ = 37644919006464. Its totient is φ = 24844978226880.

The previous prime is 31213450042393. The next prime is 31213450042417. The reversal of 31213450042405 is 50424005431213.

It is an interprime number because it is at equal distance from previous prime (31213450042393) and next prime (31213450042417).

It is not a de Polignac number, because 31213450042405 - 2⁵ = 31213450042373 is a prime.

It is a Duffinian number.

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, 898234 + ... + 7951963.

It is an arithmetic number, because the mean of its divisors is an integer number (2352807437904).

Almost surely, 2^{31213450042405} is an apocalyptic number.

It is an amenable number.

31213450042405 is a deficient number, since it is larger than the sum of its proper divisors (6431468964059).

31213450042405 is a wasteful number, since it uses less digits than its factorization.

31213450042405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8853756.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 31213450042405 its reverse (50424005431213), we get a palindrome (81637455473618).

The spelling of 31213450042405 in words is "thirty-one trillion, two hundred thirteen billion, four hundred fifty million, forty-two thousand, four hundred five".