212545513 has 2 divisors, whose sum is σ = 212545514. Its totient is φ = 212545512.

The previous prime is 212545493. The next prime is 212545561. The reversal of 212545513 is 315545212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187224489 + 25321024 = 13683^2 + 5032^2 .

It is a cyclic number.

It is not a de Polignac number, because 212545513 - 2¹³ = 212537321 is a prime.

It is equal to p_11734318 and since 212545513 and 11734318 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (212545573) 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, 106272756 + 106272757.

It is an arithmetic number, because the mean of its divisors is an integer number (106272757).

Almost surely, 2^212545513 is an apocalyptic number.

It is an amenable number.

212545513 is a deficient number, since it is larger than the sum of its proper divisors (1).

212545513 is an equidigital number, since it uses as much as digits as its factorization.

212545513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 28.

The square root of 212545513 is about 14578.9407365556. The cubic root of 212545513 is about 596.7841960601.

The spelling of 212545513 in words is "two hundred twelve million, five hundred forty-five thousand, five hundred thirteen".