505638715 has 4 divisors (see below), whose sum is σ = 606766464. Its totient is φ = 404510968.

The previous prime is 505638713. The next prime is 505638761. The reversal of 505638715 is 517836505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 517836505 = 5 ⋅103567301.

It is a cyclic number.

It is not a de Polignac number, because 505638715 - 2¹ = 505638713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505638713) 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, 50563867 + ... + 50563876.

It is an arithmetic number, because the mean of its divisors is an integer number (151691616).

Almost surely, 2^505638715 is an apocalyptic number.

505638715 is a deficient number, since it is larger than the sum of its proper divisors (101127749).

505638715 is a wasteful number, since it uses less digits than its factorization.

505638715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101127748.

The product of its (nonzero) digits is 126000, while the sum is 40.

The square root of 505638715 is about 22486.4117857874. The cubic root of 505638715 is about 796.6730138634.

The spelling of 505638715 in words is "five hundred five million, six hundred thirty-eight thousand, seven hundred fifteen".