80821501 has 8 divisors (see below), whose sum is σ = 82271808. Its totient is φ = 79380000.

The previous prime is 80821493. The next prime is 80821511. The reversal of 80821501 is 10512808.

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 80821501 - 2³ = 80821493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80821511) 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, 17926 + ... + 21976.

It is an arithmetic number, because the mean of its divisors is an integer number (10283976).

Almost surely, 2^80821501 is an apocalyptic number.

It is an amenable number.

80821501 is a deficient number, since it is larger than the sum of its proper divisors (1450307).

80821501 is a wasteful number, since it uses less digits than its factorization.

80821501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4403.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 80821501 is about 8990.0779195733. The cubic root of 80821501 is about 432.3568100501.

The spelling of 80821501 in words is "eighty million, eight hundred twenty-one thousand, five hundred one".