505511000053 has 4 divisors (see below), whose sum is σ = 511190899020. Its totient is φ = 499831101088.

The previous prime is 505511000051. The next prime is 505511000087. The reversal of 505511000053 is 350000115505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 350000115505 = 5 ⋅70000023101.

It can be written as a sum of positive squares in 2 ways, for example, as 75959218449 + 429551781604 = 275607^2 + 655402^2 .

It is a cyclic number.

It is not a de Polignac number, because 505511000053 - 2¹ = 505511000051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505510999991 and 505511000027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505511000051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2839949350 + ... + 2839949527.

It is an arithmetic number, because the mean of its divisors is an integer number (127797724755).

Almost surely, 2^505511000053 is an apocalyptic number.

It is an amenable number.

505511000053 is a deficient number, since it is larger than the sum of its proper divisors (5679898967).

505511000053 is an equidigital number, since it uses as much as digits as its factorization.

505511000053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679898966.

The product of its (nonzero) digits is 1875, while the sum is 25.

Adding to 505511000053 its reverse (350000115505), we get a palindrome (855511115558).

The spelling of 505511000053 in words is "five hundred five billion, five hundred eleven million, fifty-three", and thus it is an aban number.