213025323449 has 2 divisors, whose sum is σ = 213025323450. Its totient is φ = 213025323448.

The previous prime is 213025323361. The next prime is 213025323463. The reversal of 213025323449 is 944323520312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210589210000 + 2436113449 = 458900^2 + 49357^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213025323449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (213025323349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106512661724 + 106512661725.

It is an arithmetic number, because the mean of its divisors is an integer number (106512661725).

Almost surely, 2^213025323449 is an apocalyptic number.

It is an amenable number.

213025323449 is a deficient number, since it is larger than the sum of its proper divisors (1).

213025323449 is an equidigital number, since it uses as much as digits as its factorization.

213025323449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 213025323449 in words is "two hundred thirteen billion, twenty-five million, three hundred twenty-three thousand, four hundred forty-nine".