205219872143 has 16 divisors (see below), whose sum is σ = 241110245376. Its totient is φ = 172203356640.

The previous prime is 205219872107. The next prime is 205219872149. The reversal of 205219872143 is 341278912502.

It is a Cunningham number, because it is equal to 453012²-1.

It is a cyclic number.

It is not a de Polignac number, because 205219872143 - 2⁸ = 205219871887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205219872094 and 205219872103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205219872149) 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, 4962530 + ... + 5003712.

It is an arithmetic number, because the mean of its divisors is an integer number (15069390336).

Almost surely, 2^205219872143 is an apocalyptic number.

205219872143 is a deficient number, since it is larger than the sum of its proper divisors (35890373233).

205219872143 is a wasteful number, since it uses less digits than its factorization.

205219872143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76054.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 205219872143 in words is "two hundred five billion, two hundred nineteen million, eight hundred seventy-two thousand, one hundred forty-three".