312212057477 has 2 divisors, whose sum is σ = 312212057478. Its totient is φ = 312212057476.

The previous prime is 312212057473. The next prime is 312212057491. The reversal of 312212057477 is 774750212213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311845181761 + 366875716 = 558431^2 + 19154^2 .

It is an emirp because it is prime and its reverse (774750212213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312212057477 - 2² = 312212057473 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312212057473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156106028738 + 156106028739.

It is an arithmetic number, because the mean of its divisors is an integer number (156106028739).

Almost surely, 2^312212057477 is an apocalyptic number.

It is an amenable number.

312212057477 is a deficient number, since it is larger than the sum of its proper divisors (1).

312212057477 is an equidigital number, since it uses as much as digits as its factorization.

312212057477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164640, while the sum is 41.

The spelling of 312212057477 in words is "three hundred twelve billion, two hundred twelve million, fifty-seven thousand, four hundred seventy-seven".