80732261 has 4 divisors (see below), whose sum is σ = 82914252. Its totient is φ = 78550272.

The previous prime is 80732251. The next prime is 80732297. The reversal of 80732261 is 16223708.

It is a happy number.

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 54671236 + 26061025 = 7394^2 + 5105^2 .

It is a cyclic number.

It is not a de Polignac number, because 80732261 - 2¹⁰ = 80731237 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 (80732251) 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, 1090940 + ... + 1091013.

It is an arithmetic number, because the mean of its divisors is an integer number (20728563).

Almost surely, 2^80732261 is an apocalyptic number.

It is an amenable number.

80732261 is a deficient number, since it is larger than the sum of its proper divisors (2181991).

80732261 is a wasteful number, since it uses less digits than its factorization.

80732261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181990.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 80732261 is about 8985.1132992300. The cubic root of 80732261 is about 432.1976208460.

Adding to 80732261 its reverse (16223708), we get a palindrome (96955969).

The spelling of 80732261 in words is "eighty million, seven hundred thirty-two thousand, two hundred sixty-one".