314210821 has 2 divisors, whose sum is σ = 314210822. Its totient is φ = 314210820.

The previous prime is 314210803. The next prime is 314210833. The reversal of 314210821 is 128012413.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195160900 + 119049921 = 13970^2 + 10911^2 .

It is an emirp because it is prime and its reverse (128012413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 314210821 - 2⁵ = 314210789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 314210792 and 314210801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (314210021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157105410 + 157105411.

It is an arithmetic number, because the mean of its divisors is an integer number (157105411).

Almost surely, 2^314210821 is an apocalyptic number.

It is an amenable number.

314210821 is a deficient number, since it is larger than the sum of its proper divisors (1).

314210821 is an equidigital number, since it uses as much as digits as its factorization.

314210821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 314210821 is about 17725.9928071744. The cubic root of 314210821 is about 679.8405198377.

The spelling of 314210821 in words is "three hundred fourteen million, two hundred ten thousand, eight hundred twenty-one".