68521451 has 6 divisors (see below), whose sum is σ = 68971140. Its totient is φ = 68074668.

The previous prime is 68521423. The next prime is 68521457. The reversal of 68521451 is 15412586.

It is not a de Polignac number, because 68521451 - 2¹⁴ = 68505067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68521457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25280 + ... + 27858.

It is an arithmetic number, because the mean of its divisors is an integer number (11495190).

Almost surely, 2^68521451 is an apocalyptic number.

68521451 is a deficient number, since it is larger than the sum of its proper divisors (449689).

68521451 is an equidigital number, since it uses as much as digits as its factorization.

68521451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905 (or 2742 counting only the distinct ones).

The product of its digits is 9600, while the sum is 32.

The square root of 68521451 is about 8277.7684794877. The cubic root of 68521451 is about 409.2061796845.

The spelling of 68521451 in words is "sixty-eight million, five hundred twenty-one thousand, four hundred fifty-one".