805151 has 4 divisors (see below), whose sum is σ = 813072. Its totient is φ = 797232.

The previous prime is 805121. The next prime is 805153. The reversal of 805151 is 151508.

805151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 805151 - 2¹⁰ = 804127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805151.

It is not an unprimeable number, because it can be changed into a prime (805153) 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, 3806 + ... + 4011.

It is an arithmetic number, because the mean of its divisors is an integer number (203268).

2⁸⁰⁵¹⁵¹ is an apocalyptic number.

805151 is a deficient number, since it is larger than the sum of its proper divisors (7921).

805151 is a wasteful number, since it uses less digits than its factorization.

805151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7920.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 805151 is about 897.3020673107. The cubic root of 805151 is about 93.0305907768.

Adding to 805151 its reverse (151508), we get a palindrome (956659).

The spelling of 805151 in words is "eight hundred five thousand, one hundred fifty-one".