212545493 has 2 divisors, whose sum is σ = 212545494. Its totient is φ = 212545492.

The previous prime is 212545483. The next prime is 212545513. The reversal of 212545493 is 394545212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139665124 + 72880369 = 11818^2 + 8537^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212545493 is a prime.

It is a super-2 number, since 2×212545493² = 90351173189226098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212545483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106272746 + 106272747.

It is an arithmetic number, because the mean of its divisors is an integer number (106272747).

Almost surely, 2^212545493 is an apocalyptic number.

It is an amenable number.

212545493 is a deficient number, since it is larger than the sum of its proper divisors (1).

212545493 is an equidigital number, since it uses as much as digits as its factorization.

212545493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 35.

The square root of 212545493 is about 14578.9400506347. The cubic root of 212545493 is about 596.7841773415.

The spelling of 212545493 in words is "two hundred twelve million, five hundred forty-five thousand, four hundred ninety-three".