205623245 has 16 divisors (see below), whose sum is σ = 268327728. Its totient is φ = 150635520.

The previous prime is 205623239. The next prime is 205623277. The reversal of 205623245 is 542326502.

205623245 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 8 ways, for example, as 188356 + 205434889 = 434^2 + 14333^2 .

It is not a de Polignac number, because 205623245 - 2⁶ = 205623181 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29546 + ... + 35835.

It is an arithmetic number, because the mean of its divisors is an integer number (16770483).

Almost surely, 2^205623245 is an apocalyptic number.

It is an amenable number.

205623245 is a deficient number, since it is larger than the sum of its proper divisors (62704483).

205623245 is a wasteful number, since it uses less digits than its factorization.

205623245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65440.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 205623245 is about 14339.5692055236. The cubic root of 205623245 is about 590.2337912879.

Adding to 205623245 its reverse (542326502), we get a palindrome (747949747).

It can be divided in two parts, 20 and 5623245, that added together give a palindrome (5623265).

The spelling of 205623245 in words is "two hundred five million, six hundred twenty-three thousand, two hundred forty-five".