143361681 has 16 divisors (see below), whose sum is σ = 195820800. Its totient is φ = 93262608.

The previous prime is 143361679. The next prime is 143361719. The reversal of 143361681 is 186163341.

It is not a de Polignac number, because 143361681 - 2¹ = 143361679 is a prime.

It is a super-2 number, since 2×143361681² = 41105143158291522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (143361601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21690 + ... + 27516.

It is an arithmetic number, because the mean of its divisors is an integer number (12238800).

Almost surely, 2^143361681 is an apocalyptic number.

It is an amenable number.

143361681 is a deficient number, since it is larger than the sum of its proper divisors (52459119).

143361681 is a wasteful number, since it uses less digits than its factorization.

143361681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6028.

The product of its digits is 10368, while the sum is 33.

The square root of 143361681 is about 11973.3738353064. The cubic root of 143361681 is about 523.3726552555.

The spelling of 143361681 in words is "one hundred forty-three million, three hundred sixty-one thousand, six hundred eighty-one".