655311 has 4 divisors (see below), whose sum is σ = 873752. Its totient is φ = 436872.

The previous prime is 655301. The next prime is 655331. The reversal of 655311 is 113556.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 655311 - 2⁹ = 654799 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109216 + ... + 109221.

It is an arithmetic number, because the mean of its divisors is an integer number (218438).

2⁶⁵⁵³¹¹ is an apocalyptic number.

655311 is a deficient number, since it is larger than the sum of its proper divisors (218441).

655311 is a wasteful number, since it uses less digits than its factorization.

655311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218440.

The product of its digits is 450, while the sum is 21.

The square root of 655311 is about 809.5128164520. The cubic root of 655311 is about 86.8591988583.

Adding to 655311 its reverse (113556), we get a palindrome (768867).

The spelling of 655311 in words is "six hundred fifty-five thousand, three hundred eleven".