143220225 has 12 divisors (see below), whose sum is σ = 236790896. Its totient is φ = 76384080.

The previous prime is 143220221. The next prime is 143220251. The reversal of 143220225 is 522022341.

It is not a de Polignac number, because 143220225 - 2² = 143220221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143220221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 954727 + ... + 954876.

Almost surely, 2^143220225 is an apocalyptic number.

143220225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

143220225 is a deficient number, since it is larger than the sum of its proper divisors (93570671).

143220225 is a wasteful number, since it uses less digits than its factorization.

143220225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909616 (or 1909611 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 143220225 is about 11967.4652704739. The cubic root of 143220225 is about 523.2004600888.

Adding to 143220225 its reverse (522022341), we get a palindrome (665242566).

The spelling of 143220225 in words is "one hundred forty-three million, two hundred twenty thousand, two hundred twenty-five".