505220499 has 24 divisors (see below), whose sum is σ = 836712032. Its totient is φ = 287763840.

The previous prime is 505220489. The next prime is 505220557. The reversal of 505220499 is 994022505.

It is a happy number.

It is not a de Polignac number, because 505220499 - 2⁹ = 505219987 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505220479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6909 + ... + 32529.

Almost surely, 2^505220499 is an apocalyptic number.

505220499 is a deficient number, since it is larger than the sum of its proper divisors (331491533).

505220499 is a wasteful number, since it uses less digits than its factorization.

505220499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25947 (or 25944 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 505220499 is about 22477.1105571868. The cubic root of 505220499 is about 796.4533093641.

The spelling of 505220499 in words is "five hundred five million, two hundred twenty thousand, four hundred ninety-nine".