64215101 has 2 divisors, whose sum is σ = 64215102. Its totient is φ = 64215100.

The previous prime is 64215097. The next prime is 64215133. The reversal of 64215101 is 10151246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38763076 + 25452025 = 6226^2 + 5045^2 .

It is a cyclic number.

It is not a de Polignac number, because 64215101 - 2² = 64215097 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64215181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32107550 + 32107551.

It is an arithmetic number, because the mean of its divisors is an integer number (32107551).

Almost surely, 2^64215101 is an apocalyptic number.

It is an amenable number.

64215101 is a deficient number, since it is larger than the sum of its proper divisors (1).

64215101 is an equidigital number, since it uses as much as digits as its factorization.

64215101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 64215101 is about 8013.4325354370. The cubic root of 64215101 is about 400.4476259739.

Adding to 64215101 its reverse (10151246), we get a palindrome (74366347).

The spelling of 64215101 in words is "sixty-four million, two hundred fifteen thousand, one hundred one".