67213541 has 2 divisors, whose sum is σ = 67213542. Its totient is φ = 67213540.

The previous prime is 67213519. The next prime is 67213547. The reversal of 67213541 is 14531276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61230625 + 5982916 = 7825^2 + 2446^2 .

It is a cyclic number.

It is not a de Polignac number, because 67213541 - 2⁶ = 67213477 is a prime.

It is a Chen prime.

It is equal to p_3963620 and since 67213541 and 3963620 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67213547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33606770 + 33606771.

It is an arithmetic number, because the mean of its divisors is an integer number (33606771).

Almost surely, 2^67213541 is an apocalyptic number.

It is an amenable number.

67213541 is a deficient number, since it is larger than the sum of its proper divisors (1).

67213541 is an equidigital number, since it uses as much as digits as its factorization.

67213541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 67213541 is about 8198.3864875962. The cubic root of 67213541 is about 406.5858484774.

The spelling of 67213541 in words is "sixty-seven million, two hundred thirteen thousand, five hundred forty-one".