143221957 has 8 divisors (see below), whose sum is σ = 151782336. Its totient is φ = 134676672.

The previous prime is 143221951. The next prime is 143222021. The reversal of 143221957 is 759122341.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143221957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143221951) 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, 20158 + ... + 26320.

It is an arithmetic number, because the mean of its divisors is an integer number (18972792).

Almost surely, 2^143221957 is an apocalyptic number.

143221957 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

143221957 is a deficient number, since it is larger than the sum of its proper divisors (8560379).

143221957 is a wasteful number, since it uses less digits than its factorization.

143221957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7547.

The product of its digits is 15120, while the sum is 34.

The square root of 143221957 is about 11967.5376331140. The cubic root of 143221957 is about 523.2025691474.

The spelling of 143221957 in words is "one hundred forty-three million, two hundred twenty-one thousand, nine hundred fifty-seven".