143640225 has 81 divisors (see below), whose sum is σ = 279238297. Its totient is φ = 70567680.

The previous prime is 143640223. The next prime is 143640227. The reversal of 143640225 is 522046341.

The square root of 143640225 is 11985.

It is a perfect power (a square), and thus also a powerful number.

143640225 is a `hidden beast` number, since 1 + 436 + 4 + 0 + 225 = 666.

It is an interprime number because it is at equal distance from previous prime (143640223) and next prime (143640227).

It can be written as a sum of positive squares in 4 ways, for example, as 3359889 + 140280336 = 1833^2 + 11844^2 .

It is not a de Polignac number, because 143640225 - 2¹ = 143640223 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (143640223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 3056152 + ... + 3056198.

Almost surely, 2^143640225 is an apocalyptic number.

143640225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

143640225 is the 11985-th square number.

143640225 is the 5993-rd centered octagonal number.

It is an amenable number.

143640225 is a deficient number, since it is larger than the sum of its proper divisors (135598072).

143640225 is a wasteful number, since it uses less digits than its factorization.

143640225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The cubic root of 143640225 is about 523.7113975609.

Adding to 143640225 its reverse (522046341), we get a palindrome (665686566).

The spelling of 143640225 in words is "one hundred forty-three million, six hundred forty thousand, two hundred twenty-five".