67215013 has 2 divisors, whose sum is σ = 67215014. Its totient is φ = 67215012.

The previous prime is 67215007. The next prime is 67215041. The reversal of 67215013 is 31051276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39526369 + 27688644 = 6287^2 + 5262^2 .

It is a cyclic number.

It is not a de Polignac number, because 67215013 - 2⁵ = 67214981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67215053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33607506 + 33607507.

It is an arithmetic number, because the mean of its divisors is an integer number (33607507).

Almost surely, 2^67215013 is an apocalyptic number.

It is an amenable number.

67215013 is a deficient number, since it is larger than the sum of its proper divisors (1).

67215013 is an equidigital number, since it uses as much as digits as its factorization.

67215013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 67215013 is about 8198.4762608670. The cubic root of 67215013 is about 406.5888165797.

Adding to 67215013 its reverse (31051276), we get a palindrome (98266289).

The spelling of 67215013 in words is "sixty-seven million, two hundred fifteen thousand, thirteen".