212431013 has 4 divisors (see below), whose sum is σ = 221667168. Its totient is φ = 203194860.

The previous prime is 212431007. The next prime is 212431019. The reversal of 212431013 is 310134212.

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.

It is an interprime number because it is at equal distance from previous prime (212431007) and next prime (212431019).

It is a cyclic number.

It is not a de Polignac number, because 212431013 - 2¹⁶ = 212365477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212430982 and 212431000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212431019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4618043 + ... + 4618088.

It is an arithmetic number, because the mean of its divisors is an integer number (55416792).

Almost surely, 2^212431013 is an apocalyptic number.

212431013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

212431013 is a deficient number, since it is larger than the sum of its proper divisors (9236155).

212431013 is an equidigital number, since it uses as much as digits as its factorization.

212431013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9236154.

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

The square root of 212431013 is about 14575.0133104570. The cubic root of 212431013 is about 596.6770126410.

Adding to 212431013 its reverse (310134212), we get a palindrome (522565225).

The spelling of 212431013 in words is "two hundred twelve million, four hundred thirty-one thousand, thirteen".