505542101 has 8 divisors (see below), whose sum is σ = 532619520. Its totient is φ = 478511712.

The previous prime is 505542091. The next prime is 505542217. The reversal of 505542101 is 101245505.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505542101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505542601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11516 + ... + 33818.

It is an arithmetic number, because the mean of its divisors is an integer number (66577440).

Almost surely, 2^505542101 is an apocalyptic number.

It is an amenable number.

505542101 is a deficient number, since it is larger than the sum of its proper divisors (27077419).

505542101 is a wasteful number, since it uses less digits than its factorization.

505542101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23515.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 505542101 is about 22484.2634079927. The cubic root of 505542101 is about 796.6222696811.

Adding to 505542101 its reverse (101245505), we get a palindrome (606787606).

The spelling of 505542101 in words is "five hundred five million, five hundred forty-two thousand, one hundred one".