80051721 has 8 divisors (see below), whose sum is σ = 109339104. Its totient is φ = 52066080.

The previous prime is 80051717. The next prime is 80051737. The reversal of 80051721 is 12715008.

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

It is not a de Polignac number, because 80051721 - 2² = 80051717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80051691 and 80051700.

It is not an unprimeable number, because it can be changed into a prime (80051701) 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 7 ways as a sum of consecutive naturals, for example, 325291 + ... + 325536.

It is an arithmetic number, because the mean of its divisors is an integer number (13667388).

Almost surely, 2^80051721 is an apocalyptic number.

It is an amenable number.

80051721 is a deficient number, since it is larger than the sum of its proper divisors (29287383).

80051721 is a wasteful number, since it uses less digits than its factorization.

80051721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650871.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 80051721 is about 8947.1627346327. The cubic root of 80051721 is about 430.9797759328.

Adding to 80051721 its reverse (12715008), we get a palindrome (92766729).

The spelling of 80051721 in words is "eighty million, fifty-one thousand, seven hundred twenty-one".