505241553 has 4 divisors (see below), whose sum is σ = 673655408. Its totient is φ = 336827700.

The previous prime is 505241533. The next prime is 505241557. The reversal of 505241553 is 355142505.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 505241553 - 2¹² = 505237457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505241553.

It is not an unprimeable number, because it can be changed into a prime (505241557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84206923 + ... + 84206928.

It is an arithmetic number, because the mean of its divisors is an integer number (168413852).

Almost surely, 2^505241553 is an apocalyptic number.

It is an amenable number.

505241553 is a deficient number, since it is larger than the sum of its proper divisors (168413855).

505241553 is a wasteful number, since it uses less digits than its factorization.

505241553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168413854.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 505241553 is about 22477.5788954238. The cubic root of 505241553 is about 796.4643727151.

The spelling of 505241553 in words is "five hundred five million, two hundred forty-one thousand, five hundred fifty-three".