520215069 has 24 divisors (see below), whose sum is σ = 762482592. Its totient is φ = 312877920.

The previous prime is 520215067. The next prime is 520215097. The reversal of 520215069 is 960512025.

It is a happy number.

It is not a de Polignac number, because 520215069 - 2¹ = 520215067 is a prime.

It is a super-2 number, since 2×520215069² = 541247436029349522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520215067) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1640899 + ... + 1641215.

It is an arithmetic number, because the mean of its divisors is an integer number (31770108).

Almost surely, 2^520215069 is an apocalyptic number.

It is an amenable number.

520215069 is a deficient number, since it is larger than the sum of its proper divisors (242267523).

520215069 is a wasteful number, since it uses less digits than its factorization.

520215069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 520215069 is about 22808.2237142659. The cubic root of 520215069 is about 804.2559997023.

The spelling of 520215069 in words is "five hundred twenty million, two hundred fifteen thousand, sixty-nine".