311200231 has 2 divisors, whose sum is σ = 311200232. Its totient is φ = 311200230.

The previous prime is 311200199. The next prime is 311200243. The reversal of 311200231 is 132002113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311200231 - 2⁵ = 311200199 is a prime.

It is a super-2 number, since 2×311200231² = 193691167548906722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311200831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155600115 + 155600116.

It is an arithmetic number, because the mean of its divisors is an integer number (155600116).

Almost surely, 2^311200231 is an apocalyptic number.

311200231 is a deficient number, since it is larger than the sum of its proper divisors (1).

311200231 is an equidigital number, since it uses as much as digits as its factorization.

311200231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 311200231 is about 17640.8682042580. The cubic root of 311200231 is about 677.6622658403.

Adding to 311200231 its reverse (132002113), we get a palindrome (443202344).

The spelling of 311200231 in words is "three hundred eleven million, two hundred thousand, two hundred thirty-one".