505561269 has 4 divisors (see below), whose sum is σ = 674081696. Its totient is φ = 337040844.

The previous prime is 505561261. The next prime is 505561313. The reversal of 505561269 is 962165505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 505561269 - 2³ = 505561261 is a prime.

It is a super-2 number, since 2×505561269² = 511184393425780722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505561261) 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, 84260209 + ... + 84260214.

It is an arithmetic number, because the mean of its divisors is an integer number (168520424).

Almost surely, 2^505561269 is an apocalyptic number.

It is an amenable number.

505561269 is a deficient number, since it is larger than the sum of its proper divisors (168520427).

505561269 is a wasteful number, since it uses less digits than its factorization.

505561269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168520426.

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 505561269 is about 22484.6896576315. The cubic root of 505561269 is about 796.6323377266.

The spelling of 505561269 in words is "five hundred five million, five hundred sixty-one thousand, two hundred sixty-nine".