505740226 has 4 divisors (see below), whose sum is σ = 758610342. Its totient is φ = 252870112.

The previous prime is 505740199. The next prime is 505740239. The reversal of 505740226 is 622047505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622047505 = 5 ⋅124409501.

It can be written as a sum of positive squares in only one way, i.e., 274730625 + 231009601 = 16575^2 + 15199^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126435055 + ... + 126435058.

Almost surely, 2^505740226 is an apocalyptic number.

505740226 is a deficient number, since it is larger than the sum of its proper divisors (252870116).

505740226 is a wasteful number, since it uses less digits than its factorization.

505740226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252870115.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 505740226 is about 22488.6688356603. The cubic root of 505740226 is about 796.7263231141.

The spelling of 505740226 in words is "five hundred five million, seven hundred forty thousand, two hundred twenty-six".