143213249 has 4 divisors (see below), whose sum is σ = 149439936. Its totient is φ = 136986564.

The previous prime is 143213233. The next prime is 143213251. The reversal of 143213249 is 942312341.

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: 942312341 = 29 ⋅32493529.

It is a cyclic number.

It is not a de Polignac number, because 143213249 - 2⁴ = 143213233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143213209) 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, 3113309 + ... + 3113354.

It is an arithmetic number, because the mean of its divisors is an integer number (37359984).

Almost surely, 2^143213249 is an apocalyptic number.

It is an amenable number.

143213249 is a deficient number, since it is larger than the sum of its proper divisors (6226687).

143213249 is an equidigital number, since it uses as much as digits as its factorization.

143213249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6226686.

The product of its digits is 5184, while the sum is 29.

The square root of 143213249 is about 11967.1738100522. The cubic root of 143213249 is about 523.1919652325.

The spelling of 143213249 in words is "one hundred forty-three million, two hundred thirteen thousand, two hundred forty-nine".