64306213 has 2 divisors, whose sum is σ = 64306214. Its totient is φ = 64306212.

The previous prime is 64306171. The next prime is 64306217. The reversal of 64306213 is 31260346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57426084 + 6880129 = 7578^2 + 2623^2 .

It is a cyclic number.

It is not a de Polignac number, because 64306213 - 2²¹ = 62209061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64306217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32153106 + 32153107.

It is an arithmetic number, because the mean of its divisors is an integer number (32153107).

Almost surely, 2^64306213 is an apocalyptic number.

It is an amenable number.

64306213 is a deficient number, since it is larger than the sum of its proper divisors (1).

64306213 is an equidigital number, since it uses as much as digits as its factorization.

64306213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 64306213 is about 8019.1154749137. The cubic root of 64306213 is about 400.6369290153.

Adding to 64306213 its reverse (31260346), we get a palindrome (95566559).

The spelling of 64306213 in words is "sixty-four million, three hundred six thousand, two hundred thirteen".