143731228 has 6 divisors (see below), whose sum is σ = 251529656. Its totient is φ = 71865612.

The previous prime is 143731223. The next prime is 143731229. The reversal of 143731228 is 822137341.

It is a self number, because there is not a number n which added to its sum of digits gives 143731228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143731223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17966400 + ... + 17966407.

Almost surely, 2^143731228 is an apocalyptic number.

It is an amenable number.

143731228 is a deficient number, since it is larger than the sum of its proper divisors (107798428).

143731228 is a wasteful number, since it uses less digits than its factorization.

143731228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35932811 (or 35932809 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 143731228 is about 11988.7959362064. The cubic root of 143731228 is about 523.8219730096.

Adding to 143731228 its reverse (822137341), we get a palindrome (965868569).

The spelling of 143731228 in words is "one hundred forty-three million, seven hundred thirty-one thousand, two hundred twenty-eight".