505644431 has 8 divisors (see below), whose sum is σ = 520614864. Its totient is φ = 490799680.

The previous prime is 505644421. The next prime is 505644497. The reversal of 505644431 is 134446505.

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

It is a cyclic number.

It is not a de Polignac number, because 505644431 - 2¹⁴ = 505628047 is a prime.

It is a super-2 number, since 2×505644431² = 511352581202627522, 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 (505644401) 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, 23225 + ... + 39378.

It is an arithmetic number, because the mean of its divisors is an integer number (65076858).

Almost surely, 2^505644431 is an apocalyptic number.

505644431 is a deficient number, since it is larger than the sum of its proper divisors (14970433).

505644431 is a wasteful number, since it uses less digits than its factorization.

505644431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62841.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 505644431 is about 22486.5388844082. The cubic root of 505644431 is about 796.6760158525.

The spelling of 505644431 in words is "five hundred five million, six hundred forty-four thousand, four hundred thirty-one".