210145191449 has 2 divisors, whose sum is σ = 210145191450. Its totient is φ = 210145191448.

The previous prime is 210145191343. The next prime is 210145191461. The reversal of 210145191449 is 944191541012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158312473225 + 51832718224 = 397885^2 + 227668^2 .

It is a cyclic number.

It is not a de Polignac number, because 210145191449 - 2¹⁶ = 210145125913 is a prime.

It is a super-2 number, since 2×210145191449² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210145191499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105072595724 + 105072595725.

It is an arithmetic number, because the mean of its divisors is an integer number (105072595725).

Almost surely, 2^210145191449 is an apocalyptic number.

It is an amenable number.

210145191449 is a deficient number, since it is larger than the sum of its proper divisors (1).

210145191449 is an equidigital number, since it uses as much as digits as its factorization.

210145191449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 210145191449 in words is "two hundred ten billion, one hundred forty-five million, one hundred ninety-one thousand, four hundred forty-nine".