1814515081 has 2 divisors, whose sum is σ = 1814515082. Its totient is φ = 1814515080.

The previous prime is 1814515051. The next prime is 1814515091. The reversal of 1814515081 is 1805154181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1498386681 + 316128400 = 38709^2 + 17780^2 .

It is an emirp because it is prime and its reverse (1805154181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1814515081 - 2¹⁷ = 1814384009 is a prime.

It is a super-2 number, since 2×1814515081² = 6584929958352873122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1814515051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 907257540 + 907257541.

It is an arithmetic number, because the mean of its divisors is an integer number (907257541).

Almost surely, 2^1814515081 is an apocalyptic number.

It is an amenable number.

1814515081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1814515081 is an equidigital number, since it uses as much as digits as its factorization.

1814515081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6400, while the sum is 34.

The square root of 1814515081 is about 42597.1252668534. The cubic root of 1814515081 is about 1219.7014142087.

The spelling of 1814515081 in words is "one billion, eight hundred fourteen million, five hundred fifteen thousand, eighty-one".