80503261 has 4 divisors (see below), whose sum is σ = 80908000. Its totient is φ = 80098524.

The previous prime is 80503219. The next prime is 80503271. The reversal of 80503261 is 16230508.

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 80503261 - 2¹⁵ = 80470493 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 (80503201) 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, 202071 + ... + 202468.

It is an arithmetic number, because the mean of its divisors is an integer number (20227000).

Almost surely, 2^80503261 is an apocalyptic number.

It is an amenable number.

80503261 is a deficient number, since it is larger than the sum of its proper divisors (404739).

80503261 is a wasteful number, since it uses less digits than its factorization.

80503261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404738.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 80503261 is about 8972.3609490479. The cubic root of 80503261 is about 431.7885857543.

Adding to 80503261 its reverse (16230508), we get a palindrome (96733769).

It can be divided in two parts, 8050 and 3261, that added together give a palindrome (11311).

The spelling of 80503261 in words is "eighty million, five hundred three thousand, two hundred sixty-one".