67053521 has 4 divisors (see below), whose sum is σ = 67144512. Its totient is φ = 66962532.

The previous prime is 67053517. The next prime is 67053523. The reversal of 67053521 is 12535076.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67053521 - 2² = 67053517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67053523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44381 + ... + 45866.

It is an arithmetic number, because the mean of its divisors is an integer number (16786128).

Almost surely, 2^67053521 is an apocalyptic number.

It is an amenable number.

67053521 is a deficient number, since it is larger than the sum of its proper divisors (90991).

67053521 is an equidigital number, since it uses as much as digits as its factorization.

67053521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90990.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 67053521 is about 8188.6214346494. The cubic root of 67053521 is about 406.2629295767.

Adding to 67053521 its reverse (12535076), we get a palindrome (79588597).

The spelling of 67053521 in words is "sixty-seven million, fifty-three thousand, five hundred twenty-one".