312132222 has 24 divisors (see below), whose sum is σ = 694565976. Its totient is φ = 101231856.

The previous prime is 312132173. The next prime is 312132229. The reversal of 312132222 is 222231213.

312132222 is a `hidden beast` number, since 312 + 132 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 312132195 and 312132204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312132229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233668 + ... + 234999.

It is an arithmetic number, because the mean of its divisors is an integer number (28940249).

Almost surely, 2^312132222 is an apocalyptic number.

312132222 is an abundant number, since it is smaller than the sum of its proper divisors (382433754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312132222 is a wasteful number, since it uses less digits than its factorization.

312132222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468712 (or 468709 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 312132222 is about 17667.2641345512. The cubic root of 312132222 is about 678.3380854902.

Adding to 312132222 its reverse (222231213), we get a palindrome (534363435).

The spelling of 312132222 in words is "three hundred twelve million, one hundred thirty-two thousand, two hundred twenty-two".