143213449 has 2 divisors, whose sum is σ = 143213450. Its totient is φ = 143213448.

The previous prime is 143213437. The next prime is 143213453. The reversal of 143213449 is 944312341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127531849 + 15681600 = 11293^2 + 3960^2 .

It is a cyclic number.

It is not a de Polignac number, because 143213449 - 2¹⁷ = 143082377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143213449.

It is not a weakly prime, because it can be changed into another prime (143217449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71606724 + 71606725.

It is an arithmetic number, because the mean of its divisors is an integer number (71606725).

Almost surely, 2^143213449 is an apocalyptic number.

It is an amenable number.

143213449 is a deficient number, since it is larger than the sum of its proper divisors (1).

143213449 is an equidigital number, since it uses as much as digits as its factorization.

143213449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 143213449 is about 11967.1821662411. The cubic root of 143213449 is about 523.1922087815.

The spelling of 143213449 in words is "one hundred forty-three million, two hundred thirteen thousand, four hundred forty-nine".