311220230 has 8 divisors (see below), whose sum is σ = 560196432. Its totient is φ = 124488088.

The previous prime is 311220223. The next prime is 311220233. The reversal of 311220230 is 32022113.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×311220230² = 193716063122505800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311220233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15561002 + ... + 15561021.

It is an arithmetic number, because the mean of its divisors is an integer number (70024554).

Almost surely, 2^311220230 is an apocalyptic number.

311220230 is a deficient number, since it is larger than the sum of its proper divisors (248976202).

311220230 is a wasteful number, since it uses less digits than its factorization.

311220230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31122030.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 311220230 is about 17641.4350323323. The cubic root of 311220230 is about 677.6767819792.

Adding to 311220230 its reverse (32022113), we get a palindrome (343242343).

The spelling of 311220230 in words is "three hundred eleven million, two hundred twenty thousand, two hundred thirty".