655511 has 2 divisors, whose sum is σ = 655512. Its totient is φ = 655510.

The previous prime is 655507. The next prime is 655517. The reversal of 655511 is 115556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 655511 - 2² = 655507 is a prime.

It is a super-2 number, since 2×655511² = 859389342242, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 655511.

It is not a weakly prime, because it can be changed into another prime (655517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327755 + 327756.

It is an arithmetic number, because the mean of its divisors is an integer number (327756).

2⁶⁵⁵⁵¹¹ is an apocalyptic number.

655511 is a deficient number, since it is larger than the sum of its proper divisors (1).

655511 is an equidigital number, since it uses as much as digits as its factorization.

655511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 750, while the sum is 23.

The square root of 655511 is about 809.6363381173. The cubic root of 655511 is about 86.8680343948.

The spelling of 655511 in words is "six hundred fifty-five thousand, five hundred eleven".