80511131 has 4 divisors (see below), whose sum is σ = 80544600. Its totient is φ = 80477664.

The previous prime is 80511127. The next prime is 80511139. The reversal of 80511131 is 13111508.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80511131 - 2² = 80511127 is a prime.

It is a super-2 number, since 2×80511131² = 12964084429798322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80511139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12821 + ... + 18038.

It is an arithmetic number, because the mean of its divisors is an integer number (20136150).

Almost surely, 2^80511131 is an apocalyptic number.

80511131 is a deficient number, since it is larger than the sum of its proper divisors (33469).

80511131 is a wasteful number, since it uses less digits than its factorization.

80511131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33468.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 80511131 is about 8972.7995074001. The cubic root of 80511131 is about 431.8026558487.

Adding to 80511131 its reverse (13111508), we get a palindrome (93622639).

The spelling of 80511131 in words is "eighty million, five hundred eleven thousand, one hundred thirty-one".