312145481 has 2 divisors, whose sum is σ = 312145482. Its totient is φ = 312145480.

The previous prime is 312145469. The next prime is 312145573. The reversal of 312145481 is 184541213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197655481 + 114490000 = 14059^2 + 10700^2 .

It is a cyclic number.

It is not a de Polignac number, because 312145481 - 2¹⁸ = 311883337 is a prime.

It is a super-2 number, since 2×312145481² = 194869602617442722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312145411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156072740 + 156072741.

It is an arithmetic number, because the mean of its divisors is an integer number (156072741).

Almost surely, 2^312145481 is an apocalyptic number.

It is an amenable number.

312145481 is a deficient number, since it is larger than the sum of its proper divisors (1).

312145481 is an equidigital number, since it uses as much as digits as its factorization.

312145481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 29.

The square root of 312145481 is about 17667.6393725930. The cubic root of 312145481 is about 678.3476903486.

Adding to 312145481 its reverse (184541213), we get a palindrome (496686694).

The spelling of 312145481 in words is "three hundred twelve million, one hundred forty-five thousand, four hundred eighty-one".