80820151 has 4 divisors (see below), whose sum is σ = 81304272. Its totient is φ = 80336032.

The previous prime is 80820149. The next prime is 80820161. The reversal of 80820151 is 15102808.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80820151 - 2¹ = 80820149 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 (80820161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241810 + ... + 242143.

It is an arithmetic number, because the mean of its divisors is an integer number (20326068).

Almost surely, 2^80820151 is an apocalyptic number.

80820151 is a deficient number, since it is larger than the sum of its proper divisors (484121).

80820151 is a wasteful number, since it uses less digits than its factorization.

80820151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484120.

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

The square root of 80820151 is about 8990.0028364845. The cubic root of 80820151 is about 432.3544027495.

Adding to 80820151 its reverse (15102808), we get a palindrome (95922959).

The spelling of 80820151 in words is "eighty million, eight hundred twenty thousand, one hundred fifty-one".