312303220 has 12 divisors (see below), whose sum is σ = 655836804. Its totient is φ = 124921280.

The previous prime is 312303217. The next prime is 312303221. The reversal of 312303220 is 22303213.

It can be written as a sum of positive squares in 2 ways, for example, as 233661796 + 78641424 = 15286^2 + 8868^2 .

It is a junction number, because it is equal to n+sod(n) for n = 312303194 and 312303203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312303221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7807561 + ... + 7807600.

It is an arithmetic number, because the mean of its divisors is an integer number (54653067).

Almost surely, 2^312303220 is an apocalyptic number.

It is an amenable number.

312303220 is an abundant number, since it is smaller than the sum of its proper divisors (343533584).

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

312303220 is a wasteful number, since it uses less digits than its factorization.

312303220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15615170 (or 15615168 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 312303220 is about 17672.1028743045. The cubic root of 312303220 is about 678.4619360811.

Adding to 312303220 its reverse (22303213), we get a palindrome (334606433).

The spelling of 312303220 in words is "three hundred twelve million, three hundred three thousand, two hundred twenty".