68224529 has 4 divisors (see below), whose sum is σ = 68548080. Its totient is φ = 67900980.

The previous prime is 68224487. The next prime is 68224543. The reversal of 68224529 is 92542286.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92542286 = 2 ⋅46271143.

It is a cyclic number.

It is not a de Polignac number, because 68224529 - 2²⁴ = 51447313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68224492 and 68224501.

It is not an unprimeable number, because it can be changed into a prime (68224549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161459 + ... + 161880.

It is an arithmetic number, because the mean of its divisors is an integer number (17137020).

Almost surely, 2^68224529 is an apocalyptic number.

It is an amenable number.

68224529 is a deficient number, since it is larger than the sum of its proper divisors (323551).

68224529 is a wasteful number, since it uses less digits than its factorization.

68224529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323550.

The product of its digits is 69120, while the sum is 38.

The square root of 68224529 is about 8259.8141020243. The cubic root of 68224529 is about 408.6142568144.

The spelling of 68224529 in words is "sixty-eight million, two hundred twenty-four thousand, five hundred twenty-nine".