505545501 has 8 divisors (see below), whose sum is σ = 680734944. Its totient is φ = 333693200.

The previous prime is 505545493. The next prime is 505545511. The reversal of 505545501 is 105545505.

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

It is a cyclic number.

It is not a de Polignac number, because 505545501 - 2³ = 505545493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505545511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833931 + ... + 834536.

It is an arithmetic number, because the mean of its divisors is an integer number (85091868).

Almost surely, 2^505545501 is an apocalyptic number.

It is an amenable number.

505545501 is a deficient number, since it is larger than the sum of its proper divisors (175189443).

505545501 is a wasteful number, since it uses less digits than its factorization.

505545501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668571.

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 505545501 is about 22484.3390163020. The cubic root of 505545501 is about 796.6240555591.

The spelling of 505545501 in words is "five hundred five million, five hundred forty-five thousand, five hundred one".