205489925 has 6 divisors (see below), whose sum is σ = 254807538. Its totient is φ = 164391920.

The previous prime is 205489901. The next prime is 205489927. The reversal of 205489925 is 529984502.

205489925 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 3 ways, for example, as 24910081 + 180579844 = 4991^2 + 13438^2 .

It is not a de Polignac number, because 205489925 - 2¹⁶ = 205424389 is a prime.

It is a super-2 number, since 2×205489925² = 84452218553011250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205489927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4109774 + ... + 4109823.

It is an arithmetic number, because the mean of its divisors is an integer number (42467923).

Almost surely, 2^205489925 is an apocalyptic number.

205489925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205489925 is a deficient number, since it is larger than the sum of its proper divisors (49317613).

205489925 is an equidigital number, since it uses as much as digits as its factorization.

205489925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8219607 (or 8219602 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 205489925 is about 14334.9197765457. The cubic root of 205489925 is about 590.1062003599.

The spelling of 205489925 in words is "two hundred five million, four hundred eighty-nine thousand, nine hundred twenty-five".