312211223 has 16 divisors (see below), whose sum is σ = 334768896. Its totient is φ = 290516160.

The previous prime is 312211183. The next prime is 312211247. The reversal of 312211223 is 322112213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312211223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312211253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126683 + ... + 129123.

It is an arithmetic number, because the mean of its divisors is an integer number (20923056).

Almost surely, 2^312211223 is an apocalyptic number.

312211223 is a deficient number, since it is larger than the sum of its proper divisors (22557673).

312211223 is a wasteful number, since it uses less digits than its factorization.

312211223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614.

The product of its digits is 144, while the sum is 17.

The square root of 312211223 is about 17669.4997948442. The cubic root of 312211223 is about 678.3953100282.

Adding to 312211223 its reverse (322112213), we get a palindrome (634323436).

The spelling of 312211223 in words is "three hundred twelve million, two hundred eleven thousand, two hundred twenty-three".