801515081 has 4 divisors (see below), whose sum is σ = 801686292. Its totient is φ = 801343872.

The previous prime is 801515069. The next prime is 801515083. The reversal of 801515081 is 180515108.

801515081 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 can be written as a sum of positive squares in 2 ways, for example, as 78765625 + 722749456 = 8875^2 + 26884^2 .

It is a cyclic number.

It is not a de Polignac number, because 801515081 - 2¹⁴ = 801498697 is a prime.

It is a super-2 number, since 2×801515081² = 1284852850140873122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (801515083) 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, 78380 + ... + 88013.

It is an arithmetic number, because the mean of its divisors is an integer number (200421573).

Almost surely, 2^801515081 is an apocalyptic number.

It is an amenable number.

801515081 is a deficient number, since it is larger than the sum of its proper divisors (171211).

801515081 is a wasteful number, since it uses less digits than its factorization.

801515081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171210.

The product of its (nonzero) digits is 1600, while the sum is 29.

The square root of 801515081 is about 28311.0416798817. The cubic root of 801515081 is about 928.9034290798.

The spelling of 801515081 in words is "eight hundred one million, five hundred fifteen thousand, eighty-one".