206146225 has 12 divisors (see below), whose sum is σ = 256259020. Its totient is φ = 164505600.

The previous prime is 206146211. The next prime is 206146231. The reversal of 206146225 is 522641602.

It can be written as a sum of positive squares in 6 ways, for example, as 6574096 + 199572129 = 2564^2 + 14127^2 .

It is not a de Polignac number, because 206146225 - 2¹¹ = 206144177 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 206146193 and 206146202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145 + ... + 20305.

Almost surely, 2^206146225 is an apocalyptic number.

206146225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

206146225 is a deficient number, since it is larger than the sum of its proper divisors (50112795).

206146225 is a wasteful number, since it uses less digits than its factorization.

206146225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20580 (or 20575 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 206146225 is about 14357.7931800120. The cubic root of 206146225 is about 590.7337657907.

Adding to 206146225 its reverse (522641602), we get a palindrome (728787827).

The spelling of 206146225 in words is "two hundred six million, one hundred forty-six thousand, two hundred twenty-five".