212053531517 has 2 divisors, whose sum is σ = 212053531518. Its totient is φ = 212053531516.

The previous prime is 212053531513. The next prime is 212053531631. The reversal of 212053531517 is 715135350212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211884375481 + 169156036 = 460309^2 + 13006^2 .

It is a cyclic number.

It is not a de Polignac number, because 212053531517 - 2² = 212053531513 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212053531513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106026765758 + 106026765759.

It is an arithmetic number, because the mean of its divisors is an integer number (106026765759).

Almost surely, 2^212053531517 is an apocalyptic number.

It is an amenable number.

212053531517 is a deficient number, since it is larger than the sum of its proper divisors (1).

212053531517 is an equidigital number, since it uses as much as digits as its factorization.

212053531517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31500, while the sum is 35.

Adding to 212053531517 its reverse (715135350212), we get a palindrome (927188881729).

The spelling of 212053531517 in words is "two hundred twelve billion, fifty-three million, five hundred thirty-one thousand, five hundred seventeen".