312240445 has 32 divisors (see below), whose sum is σ = 436980096. Its totient is φ = 211660800.

The previous prime is 312240427. The next prime is 312240473. The reversal of 312240445 is 544042213.

It is a happy number.

It is not a de Polignac number, because 312240445 - 2¹⁷ = 312109373 is a prime.

It is a Duffinian number.

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, 98485 + ... + 101605.

It is an arithmetic number, because the mean of its divisors is an integer number (13655628).

Almost surely, 2^312240445 is an apocalyptic number.

It is an amenable number.

312240445 is a deficient number, since it is larger than the sum of its proper divisors (124739651).

312240445 is a wasteful number, since it uses less digits than its factorization.

312240445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3261.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 312240445 is about 17670.3266806248. The cubic root of 312240445 is about 678.4164745987.

Adding to 312240445 its reverse (544042213), we get a palindrome (856282658).

The spelling of 312240445 in words is "three hundred twelve million, two hundred forty thousand, four hundred forty-five".