312540043 has 2 divisors, whose sum is σ = 312540044. Its totient is φ = 312540042.

The previous prime is 312540023. The next prime is 312540049. The reversal of 312540043 is 340045213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312540043 - 2²⁵ = 278985611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312539996 and 312540023.

It is not a weakly prime, because it can be changed into another prime (312540049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156270021 + 156270022.

It is an arithmetic number, because the mean of its divisors is an integer number (156270022).

Almost surely, 2^312540043 is an apocalyptic number.

312540043 is a deficient number, since it is larger than the sum of its proper divisors (1).

312540043 is an equidigital number, since it uses as much as digits as its factorization.

312540043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 312540043 is about 17678.8020804578. The cubic root of 312540043 is about 678.6333878240.

Adding to 312540043 its reverse (340045213), we get a palindrome (652585256).

The spelling of 312540043 in words is "three hundred twelve million, five hundred forty thousand, forty-three".