1005400051 has 2 divisors, whose sum is σ = 1005400052. Its totient is φ = 1005400050.

The previous prime is 1005400049. The next prime is 1005400079. The reversal of 1005400051 is 1500045001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1005400051 - 2¹ = 1005400049 is a prime.

Together with 1005400049, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1005399998 and 1005400034.

It is not a weakly prime, because it can be changed into another prime (1005400021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502700025 + 502700026.

It is an arithmetic number, because the mean of its divisors is an integer number (502700026).

Almost surely, 2^1005400051 is an apocalyptic number.

1005400051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005400051 is an equidigital number, since it uses as much as digits as its factorization.

1005400051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1005400051 is about 31708.0439478691. The cubic root of 1005400051 is about 1001.7967866242.

Adding to 1005400051 its reverse (1500045001), we get a palindrome (2505445052).

The spelling of 1005400051 in words is "one billion, five million, four hundred thousand, fifty-one".