212403013 has 2 divisors, whose sum is σ = 212403014. Its totient is φ = 212403012.

The previous prime is 212402969. The next prime is 212403017. The reversal of 212403013 is 310304212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145130209 + 67272804 = 12047^2 + 8202^2 .

It is a cyclic number.

It is not a de Polignac number, because 212403013 - 2²⁵ = 178848581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212403017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106201506 + 106201507.

It is an arithmetic number, because the mean of its divisors is an integer number (106201507).

Almost surely, 2^212403013 is an apocalyptic number.

It is an amenable number.

212403013 is a deficient number, since it is larger than the sum of its proper divisors (1).

212403013 is an equidigital number, since it uses as much as digits as its factorization.

212403013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 212403013 is about 14574.0527307952. The cubic root of 212403013 is about 596.6507959880.

Adding to 212403013 its reverse (310304212), we get a palindrome (522707225).

It can be divided in two parts, 212 and 403013, that added together give a square (403225 = 635²).

The spelling of 212403013 in words is "two hundred twelve million, four hundred three thousand, thirteen".