214520321 has 2 divisors, whose sum is σ = 214520322. Its totient is φ = 214520320.

The previous prime is 214520291. The next prime is 214520329. The reversal of 214520321 is 123025412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209207296 + 5313025 = 14464^2 + 2305^2 .

It is a cyclic number.

It is not a de Polignac number, because 214520321 - 2¹⁴ = 214503937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 214520293 and 214520302.

It is not a weakly prime, because it can be changed into another prime (214520329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107260160 + 107260161.

It is an arithmetic number, because the mean of its divisors is an integer number (107260161).

Almost surely, 2^214520321 is an apocalyptic number.

It is an amenable number.

214520321 is a deficient number, since it is larger than the sum of its proper divisors (1).

214520321 is an equidigital number, since it uses as much as digits as its factorization.

214520321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 214520321 is about 14646.5122469481. The cubic root of 214520321 is about 598.6267863902.

Adding to 214520321 its reverse (123025412), we get a palindrome (337545733).

The spelling of 214520321 in words is "two hundred fourteen million, five hundred twenty thousand, three hundred twenty-one".