80820851 has 8 divisors (see below), whose sum is σ = 85159680. Its totient is φ = 76490568.

The previous prime is 80820847. The next prime is 80820869. The reversal of 80820851 is 15802808.

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 80820851 - 2² = 80820847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80820841) 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, 29210 + ... + 31856.

It is an arithmetic number, because the mean of its divisors is an integer number (10644960).

Almost surely, 2^80820851 is an apocalyptic number.

80820851 is a deficient number, since it is larger than the sum of its proper divisors (4338829).

80820851 is a wasteful number, since it uses less digits than its factorization.

80820851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273.

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 80820851 is about 8990.0417685348. The cubic root of 80820851 is about 432.3556509828.

The spelling of 80820851 in words is "eighty million, eight hundred twenty thousand, eight hundred fifty-one".