312305445 has 24 divisors (see below), whose sum is σ = 546128856. Its totient is φ = 165086208.

The previous prime is 312305429. The next prime is 312305473. The reversal of 312305445 is 544503213.

312305445 is a `hidden beast` number, since 312 + 305 + 4 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3038049 + 309267396 = 1743^2 + 17586^2 .

It is not a de Polignac number, because 312305445 - 2⁴ = 312305429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25624 + ... + 35793.

It is an arithmetic number, because the mean of its divisors is an integer number (22755369).

Almost surely, 2^312305445 is an apocalyptic number.

It is an amenable number.

312305445 is a deficient number, since it is larger than the sum of its proper divisors (233823411).

312305445 is a wasteful number, since it uses less digits than its factorization.

312305445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61541 (or 61538 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 312305445 is about 17672.1658265194. The cubic root of 312305445 is about 678.4635473081.

Adding to 312305445 its reverse (544503213), we get a palindrome (856808658).

The spelling of 312305445 in words is "three hundred twelve million, three hundred five thousand, four hundred forty-five".