520148911 has 4 divisors (see below), whose sum is σ = 527475024. Its totient is φ = 512822800.

The previous prime is 520148899. The next prime is 520148927. The reversal of 520148911 is 119841025.

It is a happy number.

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 520148911 - 2⁵ = 520148879 is a prime.

It is a super-2 number, since 2×520148911² = 541109779228971842, 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 a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520148011) 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, 3662950 + ... + 3663091.

It is an arithmetic number, because the mean of its divisors is an integer number (131868756).

Almost surely, 2^520148911 is an apocalyptic number.

520148911 is a deficient number, since it is larger than the sum of its proper divisors (7326113).

520148911 is an equidigital number, since it uses as much as digits as its factorization.

520148911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7326112.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 520148911 is about 22806.7733579303. The cubic root of 520148911 is about 804.2219046858.

Adding to 520148911 its reverse (119841025), we get a palindrome (639989936).

The spelling of 520148911 in words is "five hundred twenty million, one hundred forty-eight thousand, nine hundred eleven".