143521636 has 6 divisors (see below), whose sum is σ = 251162870. Its totient is φ = 71760816.

The previous prime is 143521627. The next prime is 143521657. The reversal of 143521636 is 636125341.

It can be written as a sum of positive squares in only one way, i.e., 114361636 + 29160000 = 10694^2 + 5400^2 .

It is a junction number, because it is equal to n+sod(n) for n = 143521598 and 143521607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17940201 + ... + 17940208.

Almost surely, 2^143521636 is an apocalyptic number.

It is an amenable number.

143521636 is a deficient number, since it is larger than the sum of its proper divisors (107641234).

143521636 is a wasteful number, since it uses less digits than its factorization.

143521636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35880413 (or 35880411 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 143521636 is about 11980.0515858656. The cubic root of 143521636 is about 523.5672329524.

Adding to 143521636 its reverse (636125341), we get a palindrome (779646977).

The spelling of 143521636 in words is "one hundred forty-three million, five hundred twenty-one thousand, six hundred thirty-six".