505800025 has 6 divisors (see below), whose sum is σ = 627192062. Its totient is φ = 404640000.

The previous prime is 505800023. The next prime is 505800037. The reversal of 505800025 is 520008505.

It can be written as a sum of positive squares in 3 ways, for example, as 9223369 + 496576656 = 3037^2 + 22284^2 .

It is not a de Polignac number, because 505800025 - 2¹ = 505800023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 20232001 = 505800025 / (5 + 0 + 5 + 8 + 0 + 0 + 0 + 2 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505800023) 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, 10115976 + ... + 10116025.

Almost surely, 2^505800025 is an apocalyptic number.

It is an amenable number.

505800025 is a deficient number, since it is larger than the sum of its proper divisors (121392037).

505800025 is a wasteful number, since it uses less digits than its factorization.

505800025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20232011 (or 20232006 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 505800025 is about 22489.9983325922. The cubic root of 505800025 is about 796.7577236614.

The spelling of 505800025 in words is "five hundred five million, eight hundred thousand, twenty-five".