212513377 has 2 divisors, whose sum is σ = 212513378. Its totient is φ = 212513376.

The previous prime is 212513359. The next prime is 212513381. The reversal of 212513377 is 773315212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201384481 + 11128896 = 14191^2 + 3336^2 .

It is a cyclic number.

It is not a de Polignac number, because 212513377 - 2²³ = 204124769 is a prime.

It is not a weakly prime, because it can be changed into another prime (212513317) 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 as a sum of consecutive naturals, namely, 106256688 + 106256689.

It is an arithmetic number, because the mean of its divisors is an integer number (106256689).

Almost surely, 2^212513377 is an apocalyptic number.

It is an amenable number.

212513377 is a deficient number, since it is larger than the sum of its proper divisors (1).

212513377 is an equidigital number, since it uses as much as digits as its factorization.

212513377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 31.

The square root of 212513377 is about 14577.8385572073. The cubic root of 212513377 is about 596.7541174458.

Adding to 212513377 its reverse (773315212), we get a palindrome (985828589).

The spelling of 212513377 in words is "two hundred twelve million, five hundred thirteen thousand, three hundred seventy-seven".