520347442 has 4 divisors (see below), whose sum is σ = 780521166. Its totient is φ = 260173720.

The previous prime is 520347439. The next prime is 520347449. The reversal of 520347442 is 244743025.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 409698081 + 110649361 = 20241^2 + 10519^2 .

It is a super-2 number, since 2×520347442² = 541522920791886728, which contains 22 as substring.

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 not an unprimeable number, because it can be changed into a prime (520347449) 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 as a sum of consecutive naturals, namely, 130086859 + ... + 130086862.

Almost surely, 2^520347442 is an apocalyptic number.

520347442 is a deficient number, since it is larger than the sum of its proper divisors (260173724).

520347442 is a wasteful number, since it uses less digits than its factorization.

520347442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260173723.

The product of its (nonzero) digits is 26880, while the sum is 31.

The square root of 520347442 is about 22811.1253996816. The cubic root of 520347442 is about 804.3242104335.

The spelling of 520347442 in words is "five hundred twenty million, three hundred forty-seven thousand, four hundred forty-two".