312542731 has 2 divisors, whose sum is σ = 312542732. Its totient is φ = 312542730.

The previous prime is 312542719. The next prime is 312542767. The reversal of 312542731 is 137245213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312542731 - 2¹³ = 312534539 is a prime.

It is a super-2 number, since 2×312542731² = 195365917401876722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312542731.

It is not a weakly prime, because it can be changed into another prime (312540731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156271365 + 156271366.

It is an arithmetic number, because the mean of its divisors is an integer number (156271366).

Almost surely, 2^312542731 is an apocalyptic number.

312542731 is a deficient number, since it is larger than the sum of its proper divisors (1).

312542731 is an equidigital number, since it uses as much as digits as its factorization.

312542731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 312542731 is about 17678.8781035449. The cubic root of 312542731 is about 678.6353333468.

Adding to 312542731 its reverse (137245213), we get a palindrome (449787944).

The spelling of 312542731 in words is "three hundred twelve million, five hundred forty-two thousand, seven hundred thirty-one".