505240355 has 4 divisors (see below), whose sum is σ = 606288432. Its totient is φ = 404192280.

The previous prime is 505240321. The next prime is 505240363. The reversal of 505240355 is 553042505.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553042505 = 5 ⋅110608501.

It is not a de Polignac number, because 505240355 - 2¹⁸ = 504978211 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50524031 + ... + 50524040.

It is an arithmetic number, because the mean of its divisors is an integer number (151572108).

Almost surely, 2^505240355 is an apocalyptic number.

505240355 is a deficient number, since it is larger than the sum of its proper divisors (101048077).

505240355 is a wasteful number, since it uses less digits than its factorization.

505240355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101048076.

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 505240355 is about 22477.5522466304. The cubic root of 505240355 is about 796.4637432043.

The spelling of 505240355 in words is "five hundred five million, two hundred forty thousand, three hundred fifty-five".