520203091 has 4 divisors (see below), whose sum is σ = 534262672. Its totient is φ = 506143512.

The previous prime is 520203083. The next prime is 520203107. The reversal of 520203091 is 190302025.

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 520203091 - 2³ = 520203083 is a prime.

It is a super-2 number, since 2×520203091² = 541222511771908562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520203011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7029735 + ... + 7029808.

It is an arithmetic number, because the mean of its divisors is an integer number (133565668).

Almost surely, 2^520203091 is an apocalyptic number.

520203091 is a deficient number, since it is larger than the sum of its proper divisors (14059581).

520203091 is a wasteful number, since it uses less digits than its factorization.

520203091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14059580.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 520203091 is about 22807.9611320258. The cubic root of 520203091 is about 804.2498269654.

The spelling of 520203091 in words is "five hundred twenty million, two hundred three thousand, ninety-one".