212152417 has 2 divisors, whose sum is σ = 212152418. Its totient is φ = 212152416.

The previous prime is 212152403. The next prime is 212152427. The reversal of 212152417 is 714251212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131583841 + 80568576 = 11471^2 + 8976^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212152417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212152391 and 212152400.

It is not a weakly prime, because it can be changed into another prime (212152427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106076208 + 106076209.

It is an arithmetic number, because the mean of its divisors is an integer number (106076209).

Almost surely, 2^212152417 is an apocalyptic number.

It is an amenable number.

212152417 is a deficient number, since it is larger than the sum of its proper divisors (1).

212152417 is an equidigital number, since it uses as much as digits as its factorization.

212152417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 25.

The square root of 212152417 is about 14565.4528594205. The cubic root of 212152417 is about 596.4160580393.

It can be divided in two parts, 21215 and 2417, that added together give a palindrome (23632).

The spelling of 212152417 in words is "two hundred twelve million, one hundred fifty-two thousand, four hundred seventeen".