317571421 has 2 divisors, whose sum is σ = 317571422. Its totient is φ = 317571420.

The previous prime is 317571367. The next prime is 317571437. The reversal of 317571421 is 124175713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161671225 + 155900196 = 12715^2 + 12486^2 .

It is a cyclic number.

It is not a de Polignac number, because 317571421 - 2¹⁷ = 317440349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317571451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158785710 + 158785711.

It is an arithmetic number, because the mean of its divisors is an integer number (158785711).

Almost surely, 2^317571421 is an apocalyptic number.

It is an amenable number.

317571421 is a deficient number, since it is larger than the sum of its proper divisors (1).

317571421 is an equidigital number, since it uses as much as digits as its factorization.

317571421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5880, while the sum is 31.

The square root of 317571421 is about 17820.5336901003. The cubic root of 317571421 is about 682.2556445655.

The spelling of 317571421 in words is "three hundred seventeen million, five hundred seventy-one thousand, four hundred twenty-one".