505538725 has 6 divisors (see below), whose sum is σ = 626868050. Its totient is φ = 404430960.

The previous prime is 505538723. The next prime is 505538743. The reversal of 505538725 is 527835505.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 143664196 + 361874529 = 11986^2 + 19023^2 .

It is not a de Polignac number, because 505538725 - 2¹ = 505538723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505538723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10110750 + ... + 10110799.

Almost surely, 2^505538725 is an apocalyptic number.

It is an amenable number.

505538725 is a deficient number, since it is larger than the sum of its proper divisors (121329325).

505538725 is a wasteful number, since it uses less digits than its factorization.

505538725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20221559 (or 20221554 counting only the distinct ones).

The product of its (nonzero) digits is 210000, while the sum is 40.

The square root of 505538725 is about 22484.1883331376. The cubic root of 505538725 is about 796.6204964013.

The spelling of 505538725 in words is "five hundred five million, five hundred thirty-eight thousand, seven hundred twenty-five".