312162481 has 2 divisors, whose sum is σ = 312162482. Its totient is φ = 312162480.

The previous prime is 312162443. The next prime is 312162503. The reversal of 312162481 is 184261213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281736225 + 30426256 = 16785^2 + 5516^2 .

It is an emirp because it is prime and its reverse (184261213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312162481 - 2⁷ = 312162353 is a prime.

It is a super-2 number, since 2×312162481² = 194890829088150722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312162181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156081240 + 156081241.

It is an arithmetic number, because the mean of its divisors is an integer number (156081241).

Almost surely, 2^312162481 is an apocalyptic number.

It is an amenable number.

312162481 is a deficient number, since it is larger than the sum of its proper divisors (1).

312162481 is an equidigital number, since it uses as much as digits as its factorization.

312162481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The square root of 312162481 is about 17668.1204716291. The cubic root of 312162481 is about 678.3600048003.

The spelling of 312162481 in words is "three hundred twelve million, one hundred sixty-two thousand, four hundred eighty-one".