312161304 has 128 divisors (see below), whose sum is σ = 986711040. Its totient is φ = 80082432.

The previous prime is 312161299. The next prime is 312161329. The reversal of 312161304 is 403161213.

312161304 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 (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78877 + ... + 82739.

It is an arithmetic number, because the mean of its divisors is an integer number (7708680).

Almost surely, 2^312161304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312161304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (493355520).

312161304 is an abundant number, since it is smaller than the sum of its proper divisors (674549736).

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

312161304 is a wasteful number, since it uses less digits than its factorization.

312161304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929 (or 3925 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 312161304 is about 17668.0871630180. The cubic root of 312161304 is about 678.3591522201.

Subtracting 312161304 from its reverse (403161213), we obtain a palindrome (90999909).

The spelling of 312161304 in words is "three hundred twelve million, one hundred sixty-one thousand, three hundred four".