213842299249 has 2 divisors, whose sum is σ = 213842299250. Its totient is φ = 213842299248.

The previous prime is 213842299219. The next prime is 213842299267. The reversal of 213842299249 is 942992248312.

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., 145575060849 + 68267238400 = 381543^2 + 261280^2 .

It is a cyclic number.

It is not a de Polignac number, because 213842299249 - 2³³ = 205252364657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213842299249.

It is not a weakly prime, because it can be changed into another prime (213842299219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106921149624 + 106921149625.

It is an arithmetic number, because the mean of its divisors is an integer number (106921149625).

Almost surely, 2^213842299249 is an apocalyptic number.

It is an amenable number.

213842299249 is a deficient number, since it is larger than the sum of its proper divisors (1).

213842299249 is an equidigital number, since it uses as much as digits as its factorization.

213842299249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 55.

The spelling of 213842299249 in words is "two hundred thirteen billion, eight hundred forty-two million, two hundred ninety-nine thousand, two hundred forty-nine".