312145523 has 4 divisors (see below), whose sum is σ = 312193248. Its totient is φ = 312097800.

The previous prime is 312145481. The next prime is 312145573. The reversal of 312145523 is 325541213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312145523 - 2¹⁸ = 311883379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312145492 and 312145501.

It is not an unprimeable number, because it can be changed into a prime (312145573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12128 + ... + 27773.

It is an arithmetic number, because the mean of its divisors is an integer number (78048312).

Almost surely, 2^312145523 is an apocalyptic number.

312145523 is a deficient number, since it is larger than the sum of its proper divisors (47725).

312145523 is an equidigital number, since it uses as much as digits as its factorization.

312145523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47724.

The product of its digits is 3600, while the sum is 26.

The square root of 312145523 is about 17667.6405612068. The cubic root of 312145523 is about 678.3477207731.

Adding to 312145523 its reverse (325541213), we get a palindrome (637686736).

The spelling of 312145523 in words is "three hundred twelve million, one hundred forty-five thousand, five hundred twenty-three".