143021213 has 4 divisors (see below), whose sum is σ = 143177760. Its totient is φ = 142864668.

The previous prime is 143021173. The next prime is 143021237. The reversal of 143021213 is 312120341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312120341 = 13 ⋅24009257.

It is a cyclic number.

It is not a de Polignac number, because 143021213 - 2⁸ = 143020957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143021191 and 143021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143021293) 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, 76895 + ... + 78732.

It is an arithmetic number, because the mean of its divisors is an integer number (35794440).

Almost surely, 2^143021213 is an apocalyptic number.

It is an amenable number.

143021213 is a deficient number, since it is larger than the sum of its proper divisors (156547).

143021213 is an equidigital number, since it uses as much as digits as its factorization.

143021213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156546.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 143021213 is about 11959.1476702982. The cubic root of 143021213 is about 522.9580096122.

Adding to 143021213 its reverse (312120341), we get a palindrome (455141554).

The spelling of 143021213 in words is "one hundred forty-three million, twenty-one thousand, two hundred thirteen".