205772345 has 8 divisors (see below), whose sum is σ = 252180864. Its totient is φ = 161115184.

The previous prime is 205772321. The next prime is 205772363. The reversal of 205772345 is 543277502.

205772345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 205772345 - 2¹² = 205768249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437579 + ... + 438048.

It is an arithmetic number, because the mean of its divisors is an integer number (31522608).

Almost surely, 2^205772345 is an apocalyptic number.

It is an amenable number.

205772345 is a deficient number, since it is larger than the sum of its proper divisors (46408519).

205772345 is an equidigital number, since it uses as much as digits as its factorization.

205772345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875679.

The product of its (nonzero) digits is 58800, while the sum is 35.

The square root of 205772345 is about 14344.7671643704. The cubic root of 205772345 is about 590.3764188005.

It can be divided in two parts, 20577 and 2345, that added together give a palindrome (22922).

The spelling of 205772345 in words is "two hundred five million, seven hundred seventy-two thousand, three hundred forty-five".