68220525 has 24 divisors (see below), whose sum is σ = 113858784. Its totient is φ = 36040000.

The previous prime is 68220521. The next prime is 68220569. The reversal of 68220525 is 52502286.

It is not a de Polignac number, because 68220525 - 2² = 68220521 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68220492 and 68220501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68220521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3775 + ... + 12275.

It is an arithmetic number, because the mean of its divisors is an integer number (4744116).

Almost surely, 2^68220525 is an apocalyptic number.

It is an amenable number.

68220525 is a deficient number, since it is larger than the sum of its proper divisors (45638259).

68220525 is a wasteful number, since it uses less digits than its factorization.

68220525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8621 (or 8616 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 68220525 is about 8259.5717201317. The cubic root of 68220525 is about 408.6062629959.

The spelling of 68220525 in words is "sixty-eight million, two hundred twenty thousand, five hundred twenty-five".