505555725 has 12 divisors (see below), whose sum is σ = 835852256. Its totient is φ = 269629680.

The previous prime is 505555723. The next prime is 505555727. The reversal of 505555725 is 527555505.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (505555723) and next prime (505555727).

It is not a de Polignac number, because 505555725 - 2¹ = 505555723 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505555723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3370297 + ... + 3370446.

Almost surely, 2^505555725 is an apocalyptic number.

It is an amenable number.

505555725 is a deficient number, since it is larger than the sum of its proper divisors (330296531).

505555725 is a wasteful number, since it uses less digits than its factorization.

505555725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6740756 (or 6740751 counting only the distinct ones).

The product of its (nonzero) digits is 218750, while the sum is 39.

The square root of 505555725 is about 22484.5663734038. The cubic root of 505555725 is about 796.6294257513.

It can be divided in two parts, 50555 and 5725, that added together give a triangular number (56280 = T₃₃₅).

The spelling of 505555725 in words is "five hundred five million, five hundred fifty-five thousand, seven hundred twenty-five".