505223521 has 12 divisors (see below), whose sum is σ = 555886800. Its totient is φ = 458832440.

The previous prime is 505223479. The next prime is 505223581. The reversal of 505223521 is 125322505.

It is a happy number.

It is not a de Polignac number, because 505223521 - 2²¹ = 503126369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505223581) 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, 194610 + ... + 197188.

It is an arithmetic number, because the mean of its divisors is an integer number (46323900).

Almost surely, 2^505223521 is an apocalyptic number.

It is an amenable number.

505223521 is a deficient number, since it is larger than the sum of its proper divisors (50663279).

505223521 is a wasteful number, since it uses less digits than its factorization.

505223521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220 (or 4209 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 505223521 is about 22477.1777810294. The cubic root of 505223521 is about 796.4548973685.

The spelling of 505223521 in words is "five hundred five million, two hundred twenty-three thousand, five hundred twenty-one".