312240113 has 2 divisors, whose sum is σ = 312240114. Its totient is φ = 312240112.

The previous prime is 312240101. The next prime is 312240143. The reversal of 312240113 is 311042213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263477824 + 48762289 = 16232^2 + 6983^2 .

It is a cyclic number.

It is not a de Polignac number, because 312240113 - 2¹⁰ = 312239089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312240091 and 312240100.

It is not a weakly prime, because it can be changed into another prime (312240143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156120056 + 156120057.

It is an arithmetic number, because the mean of its divisors is an integer number (156120057).

Almost surely, 2^312240113 is an apocalyptic number.

It is an amenable number.

312240113 is a deficient number, since it is larger than the sum of its proper divisors (1).

312240113 is an equidigital number, since it uses as much as digits as its factorization.

312240113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 312240113 is about 17670.3172863421. The cubic root of 312240113 is about 678.4162341490.

Adding to 312240113 its reverse (311042213), we get a palindrome (623282326).

The spelling of 312240113 in words is "three hundred twelve million, two hundred forty thousand, one hundred thirteen".