205512023 has 8 divisors (see below), whose sum is σ = 211916880. Its totient is φ = 199152000.

The previous prime is 205512019. The next prime is 205512077. The reversal of 205512023 is 320215502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205512023 - 2² = 205512019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205511986 and 205512004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205502023) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1778 + ... + 20351.

It is an arithmetic number, because the mean of its divisors is an integer number (26489610).

Almost surely, 2^205512023 is an apocalyptic number.

205512023 is a deficient number, since it is larger than the sum of its proper divisors (6404857).

205512023 is a wasteful number, since it uses less digits than its factorization.

205512023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22417.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 205512023 is about 14335.6905309790. The cubic root of 205512023 is about 590.1273525719.

Adding to 205512023 its reverse (320215502), we get a palindrome (525727525).

The spelling of 205512023 in words is "two hundred five million, five hundred twelve thousand, twenty-three".