68882521 has 8 divisors (see below), whose sum is σ = 73006920. Its totient is φ = 64766208.

The previous prime is 68882491. The next prime is 68882531. The reversal of 68882521 is 12528886.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20385225 + 48497296 = 4515^2 + 6964^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68882521 - 2¹¹ = 68880473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68882531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32935 + ... + 34963.

It is an arithmetic number, because the mean of its divisors is an integer number (9125865).

Almost surely, 2^68882521 is an apocalyptic number.

It is an amenable number.

68882521 is a deficient number, since it is larger than the sum of its proper divisors (4124399).

68882521 is a wasteful number, since it uses less digits than its factorization.

68882521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043.

The product of its digits is 61440, while the sum is 40.

The square root of 68882521 is about 8299.5494456025. The cubic root of 68882521 is about 409.9236839912.

It can be divided in two parts, 6888 and 2521, that added together give a square (9409 = 97²).

The spelling of 68882521 in words is "sixty-eight million, eight hundred eighty-two thousand, five hundred twenty-one".