143021471 has 4 divisors (see below), whose sum is σ = 143538072. Its totient is φ = 142504872.

The previous prime is 143021453. The next prime is 143021491. The reversal of 143021471 is 174120341.

It is a happy number.

143021471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143021471 is a prime.

It is a super-3 number, since 3×143021471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143021491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257885 + ... + 258438.

It is an arithmetic number, because the mean of its divisors is an integer number (35884518).

Almost surely, 2^143021471 is an apocalyptic number.

143021471 is a deficient number, since it is larger than the sum of its proper divisors (516601).

143021471 is an equidigital number, since it uses as much as digits as its factorization.

143021471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516600.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 143021471 is about 11959.1584570153. The cubic root of 143021471 is about 522.9583240716.

The spelling of 143021471 in words is "one hundred forty-three million, twenty-one thousand, four hundred seventy-one".