212042437 has 2 divisors, whose sum is σ = 212042438. Its totient is φ = 212042436.

The previous prime is 212042419. The next prime is 212042459. The reversal of 212042437 is 734240212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107205316 + 104837121 = 10354^2 + 10239^2 .

It is a cyclic number.

It is not a de Polignac number, because 212042437 - 2¹⁹ = 211518149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212042407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106021218 + 106021219.

It is an arithmetic number, because the mean of its divisors is an integer number (106021219).

Almost surely, 2^212042437 is an apocalyptic number.

It is an amenable number.

212042437 is a deficient number, since it is larger than the sum of its proper divisors (1).

212042437 is an equidigital number, since it uses as much as digits as its factorization.

212042437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 212042437 is about 14561.6769982032. The cubic root of 212042437 is about 596.3129793552.

Adding to 212042437 its reverse (734240212), we get a palindrome (946282649).

The spelling of 212042437 in words is "two hundred twelve million, forty-two thousand, four hundred thirty-seven".