655204211 has 2 divisors, whose sum is σ = 655204212. Its totient is φ = 655204210.

The previous prime is 655204183. The next prime is 655204213. The reversal of 655204211 is 112402556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655204211 - 2²² = 651009907 is a prime.

It is a super-2 number, since 2×655204211² = 858585116224265042, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 655204213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (655204213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327602105 + 327602106.

It is an arithmetic number, because the mean of its divisors is an integer number (327602106).

Almost surely, 2^655204211 is an apocalyptic number.

655204211 is a deficient number, since it is larger than the sum of its proper divisors (1).

655204211 is an equidigital number, since it uses as much as digits as its factorization.

655204211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 655204211 is about 25596.9570652451. The cubic root of 655204211 is about 868.5448043158.

Adding to 655204211 its reverse (112402556), we get a palindrome (767606767).

The spelling of 655204211 in words is "six hundred fifty-five million, two hundred four thousand, two hundred eleven".