312305305 has 8 divisors (see below), whose sum is σ = 403594632. Its totient is φ = 230625408.

The previous prime is 312305303. The next prime is 312305311. The reversal of 312305305 is 503503213.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38601369 + 273703936 = 6213^2 + 16544^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 312305305 - 2¹ = 312305303 is a prime.

It is a super-2 number, since 2×312305305² = 195069207062286050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312305303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2402284 + ... + 2402413.

It is an arithmetic number, because the mean of its divisors is an integer number (50449329).

Almost surely, 2^312305305 is an apocalyptic number.

It is an amenable number.

312305305 is a deficient number, since it is larger than the sum of its proper divisors (91289327).

312305305 is a wasteful number, since it uses less digits than its factorization.

312305305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4804715.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 312305305 is about 17672.1618654878. The cubic root of 312305305 is about 678.4634459278.

Adding to 312305305 its reverse (503503213), we get a palindrome (815808518).

The spelling of 312305305 in words is "three hundred twelve million, three hundred five thousand, three hundred five".