68521101 has 32 divisors (see below), whose sum is σ = 107163648. Its totient is φ = 38480640.

The previous prime is 68521099. The next prime is 68521109. The reversal of 68521101 is 10112586.

It is not a de Polignac number, because 68521101 - 2¹ = 68521099 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68521109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36676 + ... + 38498.

It is an arithmetic number, because the mean of its divisors is an integer number (3348864).

Almost surely, 2^68521101 is an apocalyptic number.

It is an amenable number.

68521101 is a deficient number, since it is larger than the sum of its proper divisors (38642547).

68521101 is a wasteful number, since it uses less digits than its factorization.

68521101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 68521101 is about 8277.7473384974. The cubic root of 68521101 is about 409.2054829566.

Adding to 68521101 its reverse (10112586), we get a palindrome (78633687).

The spelling of 68521101 in words is "sixty-eight million, five hundred twenty-one thousand, one hundred one".