143022991 has 8 divisors (see below), whose sum is σ = 146206944. Its totient is φ = 139857120.

The previous prime is 143022973. The next prime is 143023003. The reversal of 143022991 is 199220341.

143022991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 143022991 - 2⁵ = 143022959 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 (143022961) 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, 12145 + ... + 20821.

It is an arithmetic number, because the mean of its divisors is an integer number (18275868).

Almost surely, 2^143022991 is an apocalyptic number.

143022991 is a deficient number, since it is larger than the sum of its proper divisors (3183953).

143022991 is an equidigital number, since it uses as much as digits as its factorization.

143022991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9041.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 143022991 is about 11959.2220064685. Note that the first 3 decimals coincide. The cubic root of 143022991 is about 522.9601766928.

The spelling of 143022991 in words is "one hundred forty-three million, twenty-two thousand, nine hundred ninety-one".