1816540051 has 2 divisors, whose sum is σ = 1816540052. Its totient is φ = 1816540050.

The previous prime is 1816540043. The next prime is 1816540057. The reversal of 1816540051 is 1500456181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1816540051 - 2³ = 1816540043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1816539995 and 1816540022.

It is not a weakly prime, because it can be changed into another prime (1816540057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908270025 + 908270026.

It is an arithmetic number, because the mean of its divisors is an integer number (908270026).

Almost surely, 2^1816540051 is an apocalyptic number.

1816540051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816540051 is an equidigital number, since it uses as much as digits as its factorization.

1816540051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 1816540051 is about 42620.8874966254. The cubic root of 1816540051 is about 1220.1549679972.

The spelling of 1816540051 in words is "one billion, eight hundred sixteen million, five hundred forty thousand, fifty-one".