212431143 has 4 divisors (see below), whose sum is σ = 283241528. Its totient is φ = 141620760.

The previous prime is 212431139. The next prime is 212431147. The reversal of 212431143 is 341134212.

212431143 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 an interprime number because it is at equal distance from previous prime (212431139) and next prime (212431147).

It is not a de Polignac number, because 212431143 - 2² = 212431139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212431147) 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, 35405188 + ... + 35405193.

It is an arithmetic number, because the mean of its divisors is an integer number (70810382).

Almost surely, 2^212431143 is an apocalyptic number.

212431143 is a deficient number, since it is larger than the sum of its proper divisors (70810385).

212431143 is an equidigital number, since it uses as much as digits as its factorization.

212431143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70810384.

The product of its digits is 576, while the sum is 21.

The square root of 212431143 is about 14575.0177701435. The cubic root of 212431143 is about 596.6771343558.

Adding to 212431143 its reverse (341134212), we get a palindrome (553565355).

The spelling of 212431143 in words is "two hundred twelve million, four hundred thirty-one thousand, one hundred forty-three".