273202421 has 2 divisors, whose sum is σ = 273202422. Its totient is φ = 273202420.

The previous prime is 273202409. The next prime is 273202471. The reversal of 273202421 is 124202372.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269419396 + 3783025 = 16414^2 + 1945^2 .

It is a cyclic number.

It is not a de Polignac number, because 273202421 - 2¹⁸ = 272940277 is a prime.

It is a super-2 number, since 2×273202421² = 149279125680522482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (273202471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136601210 + 136601211.

It is an arithmetic number, because the mean of its divisors is an integer number (136601211).

Almost surely, 2^273202421 is an apocalyptic number.

It is an amenable number.

273202421 is a deficient number, since it is larger than the sum of its proper divisors (1).

273202421 is an equidigital number, since it uses as much as digits as its factorization.

273202421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 273202421 is about 16528.8360449246. The cubic root of 273202421 is about 648.8757061536.

Adding to 273202421 its reverse (124202372), we get a palindrome (397404793).

The spelling of 273202421 in words is "two hundred seventy-three million, two hundred two thousand, four hundred twenty-one".