311201255 has 4 divisors (see below), whose sum is σ = 373441512. Its totient is φ = 248961000.

The previous prime is 311201249. The next prime is 311201299. The reversal of 311201255 is 552102113.

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 311201255 - 2⁸ = 311200999 is a prime.

It is a super-2 number, since 2×311201255² = 193692442227150050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31120121 + ... + 31120130.

It is an arithmetic number, because the mean of its divisors is an integer number (93360378).

Almost surely, 2^311201255 is an apocalyptic number.

311201255 is a deficient number, since it is larger than the sum of its proper divisors (62240257).

311201255 is an equidigital number, since it uses as much as digits as its factorization.

311201255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62240256.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 311201255 is about 17640.8972277489. The cubic root of 311201255 is about 677.6630091189.

Adding to 311201255 its reverse (552102113), we get a palindrome (863303368).

The spelling of 311201255 in words is "three hundred eleven million, two hundred one thousand, two hundred fifty-five".