312226477 has 2 divisors, whose sum is σ = 312226478. Its totient is φ = 312226476.

The previous prime is 312226459. The next prime is 312226511. The reversal of 312226477 is 774622213.

It is an a-pointer prime, because the next prime (312226511) can be obtained adding 312226477 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 292102281 + 20124196 = 17091^2 + 4486^2 .

It is an emirp because it is prime and its reverse (774622213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312226477 - 2⁷ = 312226349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312226457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156113238 + 156113239.

It is an arithmetic number, because the mean of its divisors is an integer number (156113239).

Almost surely, 2^312226477 is an apocalyptic number.

It is an amenable number.

312226477 is a deficient number, since it is larger than the sum of its proper divisors (1).

312226477 is an equidigital number, since it uses as much as digits as its factorization.

312226477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 34.

The square root of 312226477 is about 17669.9314373316. The cubic root of 312226477 is about 678.4063581827.

The spelling of 312226477 in words is "three hundred twelve million, two hundred twenty-six thousand, four hundred seventy-seven".