505541431 has 4 divisors (see below), whose sum is σ = 506742664. Its totient is φ = 504340200.

The previous prime is 505541429. The next prime is 505541437. The reversal of 505541431 is 134145505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505541431 - 2¹ = 505541429 is a prime.

It is a super-2 number, since 2×505541431² = 511144276915055522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505541431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505541437) 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 3 ways as a sum of consecutive naturals, for example, 599985 + ... + 600826.

It is an arithmetic number, because the mean of its divisors is an integer number (126685666).

Almost surely, 2^505541431 is an apocalyptic number.

505541431 is a deficient number, since it is larger than the sum of its proper divisors (1201233).

505541431 is a wasteful number, since it uses less digits than its factorization.

505541431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201232.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 505541431 is about 22484.2485086782. The cubic root of 505541431 is about 796.6219177571.

Adding to 505541431 its reverse (134145505), we get a palindrome (639686936).

The spelling of 505541431 in words is "five hundred five million, five hundred forty-one thousand, four hundred thirty-one".