212147449 has 2 divisors, whose sum is σ = 212147450. Its totient is φ = 212147448.

The previous prime is 212147401. The next prime is 212147461. The reversal of 212147449 is 944741212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208658025 + 3489424 = 14445^2 + 1868^2 .

It is a cyclic number.

It is not a de Polignac number, because 212147449 - 2²¹ = 210050297 is a prime.

It is not a weakly prime, because it can be changed into another prime (212147479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106073724 + 106073725.

It is an arithmetic number, because the mean of its divisors is an integer number (106073725).

Almost surely, 2^212147449 is an apocalyptic number.

It is an amenable number.

212147449 is a deficient number, since it is larger than the sum of its proper divisors (1).

212147449 is an equidigital number, since it uses as much as digits as its factorization.

212147449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 212147449 is about 14565.2823178955. The cubic root of 212147449 is about 596.4114025529.

The spelling of 212147449 in words is "two hundred twelve million, one hundred forty-seven thousand, four hundred forty-nine".