520205351 has 4 divisors (see below), whose sum is σ = 547584600. Its totient is φ = 492826104.

The previous prime is 520205347. The next prime is 520205369. The reversal of 520205351 is 153502025.

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

It is not a de Polignac number, because 520205351 - 2² = 520205347 is a prime.

It is a super-2 number, since 2×520205351² = 541227214418066402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520205051) 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, 13689596 + ... + 13689633.

It is an arithmetic number, because the mean of its divisors is an integer number (136896150).

Almost surely, 2^520205351 is an apocalyptic number.

520205351 is a deficient number, since it is larger than the sum of its proper divisors (27379249).

520205351 is a wasteful number, since it uses less digits than its factorization.

520205351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27379248.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 520205351 is about 22808.0106760761. The cubic root of 520205351 is about 804.2509916400.

Adding to 520205351 its reverse (153502025), we get a palindrome (673707376).

The spelling of 520205351 in words is "five hundred twenty million, two hundred five thousand, three hundred fifty-one".