312217502477 has 2 divisors, whose sum is σ = 312217502478. Its totient is φ = 312217502476.

The previous prime is 312217502459. The next prime is 312217502491. The reversal of 312217502477 is 774205712213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215724020521 + 96493481956 = 464461^2 + 310634^2 .

It is a cyclic number.

It is not a de Polignac number, because 312217502477 - 2⁸ = 312217502221 is a prime.

It is a super-2 number, since 2×312217502477² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312217504477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156108751238 + 156108751239.

It is an arithmetic number, because the mean of its divisors is an integer number (156108751239).

Almost surely, 2^312217502477 is an apocalyptic number.

It is an amenable number.

312217502477 is a deficient number, since it is larger than the sum of its proper divisors (1).

312217502477 is an equidigital number, since it uses as much as digits as its factorization.

312217502477 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 312217502477 in words is "three hundred twelve billion, two hundred seventeen million, five hundred two thousand, four hundred seventy-seven".