80515231 has 2 divisors, whose sum is σ = 80515232. Its totient is φ = 80515230.

The previous prime is 80515199. The next prime is 80515241. The reversal of 80515231 is 13251508.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80515231 - 2⁵ = 80515199 is a prime.

It is a super-2 number, since 2×80515231² = 12965404845966722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80515196 and 80515205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80515241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40257615 + 40257616.

It is an arithmetic number, because the mean of its divisors is an integer number (40257616).

Almost surely, 2^80515231 is an apocalyptic number.

80515231 is a deficient number, since it is larger than the sum of its proper divisors (1).

80515231 is an equidigital number, since it uses as much as digits as its factorization.

80515231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 80515231 is about 8973.0279727637. The cubic root of 80515231 is about 431.8099855219.

Adding to 80515231 its reverse (13251508), we get a palindrome (93766739).

The spelling of 80515231 in words is "eighty million, five hundred fifteen thousand, two hundred thirty-one".