80181001 has 4 divisors (see below), whose sum is σ = 80311572. Its totient is φ = 80050432.

The previous prime is 80180983. The next prime is 80181037. The reversal of 80181001 is 10018108.

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 18966025 + 61214976 = 4355^2 + 7824^2 .

It is a cyclic number.

It is not a de Polignac number, because 80181001 - 2⁷ = 80180873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80181001.

It is not an unprimeable number, because it can be changed into a prime (80181091) 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, 64360 + ... + 65593.

It is an arithmetic number, because the mean of its divisors is an integer number (20077893).

Almost surely, 2^80181001 is an apocalyptic number.

It is an amenable number.

80181001 is a deficient number, since it is larger than the sum of its proper divisors (130571).

80181001 is a wasteful number, since it uses less digits than its factorization.

80181001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130570.

The product of its (nonzero) digits is 64, while the sum is 19.

The square root of 80181001 is about 8954.3844567899. The cubic root of 80181001 is about 431.2116555979.

Adding to 80181001 its reverse (10018108), we get a palindrome (90199109).

The spelling of 80181001 in words is "eighty million, one hundred eighty-one thousand, one".