143172906205 has 24 divisors (see below), whose sum is σ = 199906525368. Its totient is φ = 98151717888.

The previous prime is 143172906139. The next prime is 143172906269. The reversal of 143172906205 is 502609271341.

It is a happy number.

143172906205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 45292778041 + 97880128164 = 212821^2 + 312858^2 .

It is not a de Polignac number, because 143172906205 - 2¹¹ = 143172904157 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 (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 963877 + ... + 1102453.

It is an arithmetic number, because the mean of its divisors is an integer number (8329438557).

Almost surely, 2^143172906205 is an apocalyptic number.

It is an amenable number.

143172906205 is a deficient number, since it is larger than the sum of its proper divisors (56733619163).

143172906205 is a wasteful number, since it uses less digits than its factorization.

143172906205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142813 (or 142806 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 143172906205 in words is "one hundred forty-three billion, one hundred seventy-two million, nine hundred six thousand, two hundred five".