80357821 has 16 divisors (see below), whose sum is σ = 87564160. Its totient is φ = 73483200.

The previous prime is 80357813. The next prime is 80357839. The reversal of 80357821 is 12875308.

80357821 is nontrivially palindromic in base 3.

80357821 is an esthetic number in base 3, because in such base its adjacent digits differ by 1.

It is a cyclic number.

It is not a de Polignac number, because 80357821 - 2³ = 80357813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80357881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105775 + ... + 106531.

It is an arithmetic number, because the mean of its divisors is an integer number (5472760).

Almost surely, 2^80357821 is an apocalyptic number.

It is an amenable number.

80357821 is a deficient number, since it is larger than the sum of its proper divisors (7206339).

80357821 is a wasteful number, since it uses less digits than its factorization.

80357821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 80357821 is about 8964.2523949295. The cubic root of 80357821 is about 431.5284008971.

The spelling of 80357821 in words is "eighty million, three hundred fifty-seven thousand, eight hundred twenty-one".