212312449 has 2 divisors, whose sum is σ = 212312450. Its totient is φ = 212312448.

The previous prime is 212312447. The next prime is 212312461. The reversal of 212312449 is 944213212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161290000 + 51022449 = 12700^2 + 7143^2 .

It is a cyclic number.

It is not a de Polignac number, because 212312449 - 2¹ = 212312447 is a prime.

Together with 212312447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212312447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106156224 + 106156225.

It is an arithmetic number, because the mean of its divisors is an integer number (106156225).

Almost surely, 2^212312449 is an apocalyptic number.

It is an amenable number.

212312449 is a deficient number, since it is larger than the sum of its proper divisors (1).

212312449 is an equidigital number, since it uses as much as digits as its factorization.

212312449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 212312449 is about 14570.9453708399. The cubic root of 212312449 is about 596.5659843156.

The spelling of 212312449 in words is "two hundred twelve million, three hundred twelve thousand, four hundred forty-nine".