212415904969 has 2 divisors, whose sum is σ = 212415904970. Its totient is φ = 212415904968.

The previous prime is 212415904963. The next prime is 212415905047. The reversal of 212415904969 is 969409514212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209027268025 + 3388636944 = 457195^2 + 58212^2 .

It is a cyclic number.

It is not a de Polignac number, because 212415904969 - 2⁹ = 212415904457 is a prime.

It is a super-2 number, since 2×212415904969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212415904963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106207952484 + 106207952485.

It is an arithmetic number, because the mean of its divisors is an integer number (106207952485).

Almost surely, 2^212415904969 is an apocalyptic number.

It is an amenable number.

212415904969 is a deficient number, since it is larger than the sum of its proper divisors (1).

212415904969 is an equidigital number, since it uses as much as digits as its factorization.

212415904969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 212415904969 in words is "two hundred twelve billion, four hundred fifteen million, nine hundred four thousand, nine hundred sixty-nine".