801328181 has 4 divisors (see below), whose sum is σ = 802013664. Its totient is φ = 800642700.

The previous prime is 801328163. The next prime is 801328183. The reversal of 801328181 is 181823108.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 801328181 - 2¹⁸ = 801066037 is a prime.

It is a super-2 number, since 2×801328181² = 1284253707329537522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801328183) 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, 340985 + ... + 343326.

It is an arithmetic number, because the mean of its divisors is an integer number (200503416).

Almost surely, 2^801328181 is an apocalyptic number.

It is an amenable number.

801328181 is a deficient number, since it is larger than the sum of its proper divisors (685483).

801328181 is a wasteful number, since it uses less digits than its factorization.

801328181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685482.

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 801328181 is about 28307.7406551636. The cubic root of 801328181 is about 928.8312218516.

The spelling of 801328181 in words is "eight hundred one million, three hundred twenty-eight thousand, one hundred eighty-one".