505821925 has 12 divisors (see below), whose sum is σ = 716822176. Its totient is φ = 346849200.

The previous prime is 505821881. The next prime is 505821929. The reversal of 505821925 is 529128505.

It is not a de Polignac number, because 505821925 - 2¹¹ = 505819877 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505821929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1445031 + ... + 1445380.

Almost surely, 2^505821925 is an apocalyptic number.

It is an amenable number.

505821925 is a deficient number, since it is larger than the sum of its proper divisors (211000251).

505821925 is a wasteful number, since it uses less digits than its factorization.

505821925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890428 (or 2890423 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 505821925 is about 22490.4852104173. The cubic root of 505821925 is about 796.7692227661.

The spelling of 505821925 in words is "five hundred five million, eight hundred twenty-one thousand, nine hundred twenty-five".