31423505356163 has 16 divisors (see below), whose sum is σ = 33367226508000. Its totient is φ = 29490375991296.

The previous prime is 31423505356127. The next prime is 31423505356211. The reversal of 31423505356163 is 36165350532413.

It is not a de Polignac number, because 31423505356163 - 2²² = 31423501161859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31423505356063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272009588 + ... + 272125086.

It is an arithmetic number, because the mean of its divisors is an integer number (2085451656750).

Almost surely, 2^{31423505356163} is an apocalyptic number.

31423505356163 is a deficient number, since it is larger than the sum of its proper divisors (1943721151837).

31423505356163 is a wasteful number, since it uses less digits than its factorization.

31423505356163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161206.

The product of its (nonzero) digits is 2916000, while the sum is 47.

Adding to 31423505356163 its reverse (36165350532413), we get a palindrome (67588855888576).

The spelling of 31423505356163 in words is "thirty-one trillion, four hundred twenty-three billion, five hundred five million, three hundred fifty-six thousand, one hundred sixty-three".