1805000051 has 2 divisors, whose sum is σ = 1805000052. Its totient is φ = 1805000050.

The previous prime is 1804999969. The next prime is 1805000063. The reversal of 1805000051 is 1500005081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1805000051 - 2²⁶ = 1737891187 is a prime.

It is a super-2 number, since 2×1805000051² = 6516050368220005202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1804999987 and 1805000032.

It is not a weakly prime, because it can be changed into another prime (1805000251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902500025 + 902500026.

It is an arithmetic number, because the mean of its divisors is an integer number (902500026).

Almost surely, 2^1805000051 is an apocalyptic number.

1805000051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1805000051 is an equidigital number, since it uses as much as digits as its factorization.

1805000051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1805000051 is about 42485.2921727037. The cubic root of 1805000051 is about 1217.5657029898.

The spelling of 1805000051 in words is "one billion, eight hundred five million, fifty-one", and thus it is an aban number.