80815519 has 2 divisors, whose sum is σ = 80815520. Its totient is φ = 80815518.

The previous prime is 80815477. The next prime is 80815541. The reversal of 80815519 is 91551808.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80815519 - 2⁷ = 80815391 is a prime.

It is a super-2 number, since 2×80815519² = 13062296222478722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80815549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40407759 + 40407760.

It is an arithmetic number, because the mean of its divisors is an integer number (40407760).

Almost surely, 2^80815519 is an apocalyptic number.

80815519 is a deficient number, since it is larger than the sum of its proper divisors (1).

80815519 is an equidigital number, since it uses as much as digits as its factorization.

80815519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 80815519 is about 8989.7452132972. The cubic root of 80815519 is about 432.3461428299.

The spelling of 80815519 in words is "eighty million, eight hundred fifteen thousand, five hundred nineteen".