31143453020105 has 4 divisors (see below), whose sum is σ = 37372143624132. Its totient is φ = 24914762416080.

The previous prime is 31143453020089. The next prime is 31143453020131. The reversal of 31143453020105 is 50102035434113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9904848956809 + 21238604063296 = 3147197^2 + 4608536^2 .

It is not a de Polignac number, because 31143453020105 - 2⁴ = 31143453020089 is a prime.

It is a super-2 number, since 2×31143453020105² (a number of 28 digits) contains 22 as substring.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 3114345302006 + ... + 3114345302015.

It is an arithmetic number, because the mean of its divisors is an integer number (9343035906033).

Almost surely, 2^{31143453020105} is an apocalyptic number.

It is an amenable number.

31143453020105 is a deficient number, since it is larger than the sum of its proper divisors (6228690604027).

31143453020105 is an equidigital number, since it uses as much as digits as its factorization.

31143453020105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6228690604026.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 31143453020105 its reverse (50102035434113), we get a palindrome (81245488454218).

The spelling of 31143453020105 in words is "thirty-one trillion, one hundred forty-three billion, four hundred fifty-three million, twenty thousand, one hundred five".