505451213 has 4 divisors (see below), whose sum is σ = 505571580. Its totient is φ = 505330848.

The previous prime is 505451183. The next prime is 505451227. The reversal of 505451213 is 312154505.

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

It can be written as a sum of positive squares in 2 ways, for example, as 314956009 + 190495204 = 17747^2 + 13802^2 .

It is a cyclic number.

It is not a de Polignac number, because 505451213 - 2¹⁴ = 505434829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505451263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53648 + ... + 62361.

It is an arithmetic number, because the mean of its divisors is an integer number (126392895).

Almost surely, 2^505451213 is an apocalyptic number.

It is an amenable number.

505451213 is a deficient number, since it is larger than the sum of its proper divisors (120367).

505451213 is a wasteful number, since it uses less digits than its factorization.

505451213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120366.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 505451213 is about 22482.2421702107. The cubic root of 505451213 is about 796.5745270407.

The spelling of 505451213 in words is "five hundred five million, four hundred fifty-one thousand, two hundred thirteen".