312220422 has 24 divisors (see below), whose sum is σ = 681646680. Its totient is φ = 103278240.

The previous prime is 312220421. The next prime is 312220429. The reversal of 312220422 is 224022213.

312220422 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 312220395 and 312220404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312220421) 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, 63847 + ... + 68562.

It is an arithmetic number, because the mean of its divisors is an integer number (28401945).

Almost surely, 2^312220422 is an apocalyptic number.

312220422 is an abundant number, since it is smaller than the sum of its proper divisors (369426258).

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

312220422 is a wasteful number, since it uses less digits than its factorization.

312220422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132548 (or 132545 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 312220422 is about 17669.7601002391. The cubic root of 312220422 is about 678.4019727154.

Adding to 312220422 its reverse (224022213), we get a palindrome (536242635).

The spelling of 312220422 in words is "three hundred twelve million, two hundred twenty thousand, four hundred twenty-two".