312143122 has 8 divisors (see below), whose sum is σ = 474809472. Its totient is φ = 153873300.

The previous prime is 312143119. The next prime is 312143147. The reversal of 312143122 is 221341213.

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 2×312143122² = 194866657223813768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312143122.

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, 1098954 + ... + 1099237.

It is an arithmetic number, because the mean of its divisors is an integer number (59351184).

Almost surely, 2^312143122 is an apocalyptic number.

312143122 is a deficient number, since it is larger than the sum of its proper divisors (162666350).

312143122 is a wasteful number, since it uses less digits than its factorization.

312143122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198264.

The product of its digits is 288, while the sum is 19.

The square root of 312143122 is about 17667.5726119917. The cubic root of 312143122 is about 678.3459815020.

Adding to 312143122 its reverse (221341213), we get a palindrome (533484335).

The spelling of 312143122 in words is "three hundred twelve million, one hundred forty-three thousand, one hundred twenty-two".