505203212405 has 8 divisors (see below), whose sum is σ = 606251309784. Its totient is φ = 404157600000.

The previous prime is 505203212401. The next prime is 505203212417. The reversal of 505203212405 is 504212302505.

It can be written as a sum of positive squares in 4 ways, for example, as 43335889 + 505159876516 = 6583^2 + 710746^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 505203212405 - 2² = 505203212401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505203212401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140096 + ... + 1014905.

It is an arithmetic number, because the mean of its divisors is an integer number (75781413723).

Almost surely, 2^505203212405 is an apocalyptic number.

It is an amenable number.

505203212405 is a deficient number, since it is larger than the sum of its proper divisors (101048097379).

505203212405 is a wasteful number, since it uses less digits than its factorization.

505203212405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242487.

The product of its (nonzero) digits is 12000, while the sum is 29.

The spelling of 505203212405 in words is "five hundred five billion, two hundred three million, two hundred twelve thousand, four hundred five".