312540023 has 2 divisors, whose sum is σ = 312540024. Its totient is φ = 312540022.

The previous prime is 312539977. The next prime is 312540043. The reversal of 312540023 is 320045213.

It is a happy number.

It is an a-pointer prime, because the next prime (312540043) can be obtained adding 312540023 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312540023 - 2⁸ = 312539767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312539977 and 312540004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312540043) 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 as a sum of consecutive naturals, namely, 156270011 + 156270012.

It is an arithmetic number, because the mean of its divisors is an integer number (156270012).

Almost surely, 2^312540023 is an apocalyptic number.

312540023 is a deficient number, since it is larger than the sum of its proper divisors (1).

312540023 is an equidigital number, since it uses as much as digits as its factorization.

312540023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 312540023 is about 17678.8015148086. The cubic root of 312540023 is about 678.6333733484.

Adding to 312540023 its reverse (320045213), we get a palindrome (632585236).

The spelling of 312540023 in words is "three hundred twelve million, five hundred forty thousand, twenty-three".