312440071 has 2 divisors, whose sum is σ = 312440072. Its totient is φ = 312440070.

The previous prime is 312440057. The next prime is 312440081. The reversal of 312440071 is 170044213.

It is a strong prime.

It is an emirp because it is prime and its reverse (170044213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312440071 - 2¹⁹ = 311915783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312440081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156220035 + 156220036.

It is an arithmetic number, because the mean of its divisors is an integer number (156220036).

Almost surely, 2^312440071 is an apocalyptic number.

312440071 is a deficient number, since it is larger than the sum of its proper divisors (1).

312440071 is an equidigital number, since it uses as much as digits as its factorization.

312440071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 312440071 is about 17675.9744002983. The cubic root of 312440071 is about 678.5610220865.

Adding to 312440071 its reverse (170044213), we get a palindrome (482484284).

The spelling of 312440071 in words is "three hundred twelve million, four hundred forty thousand, seventy-one".