143991132 has 24 divisors (see below), whose sum is σ = 350587776. Its totient is φ = 45910128.

The previous prime is 143991131. The next prime is 143991143. The reversal of 143991132 is 231199341.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 143991093 and 143991102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143991131) 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 7 ways as a sum of consecutive naturals, for example, 260578 + ... + 261129.

It is an arithmetic number, because the mean of its divisors is an integer number (14607824).

Almost surely, 2^143991132 is an apocalyptic number.

143991132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

143991132 is an abundant number, since it is smaller than the sum of its proper divisors (206596644).

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

143991132 is a wasteful number, since it uses less digits than its factorization.

143991132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521737 (or 521735 counting only the distinct ones).

The product of its digits is 5832, while the sum is 33.

The square root of 143991132 is about 11999.6304943111. The cubic root of 143991132 is about 524.1375190215.

The spelling of 143991132 in words is "one hundred forty-three million, nine hundred ninety-one thousand, one hundred thirty-two".