505544125 has 32 divisors (see below), whose sum is σ = 654990336. Its totient is φ = 389160000.

The previous prime is 505544107. The next prime is 505544129. The reversal of 505544125 is 521445505.

It is not a de Polignac number, because 505544125 - 2⁹ = 505543613 is a prime.

It is a super-5 number, since 5×505544125⁵ (a number of 45 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505544129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1096395 + ... + 1096855.

It is an arithmetic number, because the mean of its divisors is an integer number (20468448).

Almost surely, 2^505544125 is an apocalyptic number.

It is an amenable number.

505544125 is a deficient number, since it is larger than the sum of its proper divisors (149446211).

505544125 is a wasteful number, since it uses less digits than its factorization.

505544125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 505544125 is about 22484.3084172051. The cubic root of 505544125 is about 796.6233328048.

The spelling of 505544125 in words is "five hundred five million, five hundred forty-four thousand, one hundred twenty-five".