205451423 has 4 divisors (see below), whose sum is σ = 205719360. Its totient is φ = 205183488.

The previous prime is 205451401. The next prime is 205451437. The reversal of 205451423 is 324154502.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 205451423 - 2²⁴ = 188674207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205451392 and 205451401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205451023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132815 + ... + 134352.

It is an arithmetic number, because the mean of its divisors is an integer number (51429840).

Almost surely, 2^205451423 is an apocalyptic number.

205451423 is a deficient number, since it is larger than the sum of its proper divisors (267937).

205451423 is an equidigital number, since it uses as much as digits as its factorization.

205451423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267936.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 205451423 is about 14333.5767692506. The cubic root of 205451423 is about 590.0693426111.

The spelling of 205451423 in words is "two hundred five million, four hundred fifty-one thousand, four hundred twenty-three".