143821806 has 16 divisors (see below), whose sum is σ = 300150144. Its totient is φ = 45856184.

The previous prime is 143821801. The next prime is 143821841. The reversal of 143821806 is 608128341.

143821806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×143821806² = 41369423762203272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143821801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520956 + ... + 521231.

It is an arithmetic number, because the mean of its divisors is an integer number (18759384).

Almost surely, 2^143821806 is an apocalyptic number.

143821806 is an abundant number, since it is smaller than the sum of its proper divisors (156328338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

143821806 is a wasteful number, since it uses less digits than its factorization.

143821806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042215.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 143821806 is about 11992.5729516230. The cubic root of 143821806 is about 523.9319857141.

The spelling of 143821806 in words is "one hundred forty-three million, eight hundred twenty-one thousand, eight hundred six".