202169855249 has 2 divisors, whose sum is σ = 202169855250. Its totient is φ = 202169855248.

The previous prime is 202169855203. The next prime is 202169855299. The reversal of 202169855249 is 942558961202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146530480849 + 55639374400 = 382793^2 + 235880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202169855249 is a prime.

It is a super-2 number, since 2×202169855249² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202169855249.

It is not a weakly prime, because it can be changed into another prime (202169855299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101084927624 + 101084927625.

It is an arithmetic number, because the mean of its divisors is an integer number (101084927625).

Almost surely, 2^202169855249 is an apocalyptic number.

It is an amenable number.

202169855249 is a deficient number, since it is larger than the sum of its proper divisors (1).

202169855249 is an equidigital number, since it uses as much as digits as its factorization.

202169855249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 202169855249 in words is "two hundred two billion, one hundred sixty-nine million, eight hundred fifty-five thousand, two hundred forty-nine".