505610506 has 4 divisors (see below), whose sum is σ = 758415762. Its totient is φ = 252805252.

The previous prime is 505610503. The next prime is 505610531. The reversal of 505610506 is 605016505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605016505 = 5 ⋅121003301.

It can be written as a sum of positive squares in only one way, i.e., 335073025 + 170537481 = 18305^2 + 13059^2 .

It is not an unprimeable number, because it can be changed into a prime (505610503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126402625 + ... + 126402628.

Almost surely, 2^505610506 is an apocalyptic number.

505610506 is a deficient number, since it is larger than the sum of its proper divisors (252805256).

505610506 is a wasteful number, since it uses less digits than its factorization.

505610506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252805255.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 505610506 is about 22485.7845315657. The cubic root of 505610506 is about 796.6581984320.

The spelling of 505610506 in words is "five hundred five million, six hundred ten thousand, five hundred six".