143212013 has 4 divisors (see below), whose sum is σ = 163670880. Its totient is φ = 122753148.

The previous prime is 143212009. The next prime is 143212037. The reversal of 143212013 is 310212341.

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: 310212341 = 14369 ⋅21589.

It is not a de Polignac number, because 143212013 - 2² = 143212009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 143211982 and 143212000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143212073) 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, 10229423 + ... + 10229436.

It is an arithmetic number, because the mean of its divisors is an integer number (40917720).

Almost surely, 2^143212013 is an apocalyptic number.

It is an amenable number.

143212013 is a deficient number, since it is larger than the sum of its proper divisors (20458867).

143212013 is an equidigital number, since it uses as much as digits as its factorization.

143212013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20458866.

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

The square root of 143212013 is about 11967.1221686753. The cubic root of 143212013 is about 523.1904600945.

Adding to 143212013 its reverse (310212341), we get a palindrome (453424354).

The spelling of 143212013 in words is "one hundred forty-three million, two hundred twelve thousand, thirteen".