505511000051 has 2 divisors, whose sum is σ = 505511000052. Its totient is φ = 505511000050.

The previous prime is 505511000047. The next prime is 505511000087. The reversal of 505511000051 is 150000115505.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505511000051 - 2² = 505511000047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 505510999990 and 505511000026.

It is not a weakly prime, because it can be changed into another prime (505511000251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252755500025 + 252755500026.

It is an arithmetic number, because the mean of its divisors is an integer number (252755500026).

Almost surely, 2^505511000051 is an apocalyptic number.

505511000051 is a deficient number, since it is larger than the sum of its proper divisors (1).

505511000051 is an equidigital number, since it uses as much as digits as its factorization.

505511000051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 625, while the sum is 23.

Adding to 505511000051 its reverse (150000115505), we get a palindrome (655511115556).

The spelling of 505511000051 in words is "five hundred five billion, five hundred eleven million, fifty-one", and thus it is an aban number.