520151220 has 288 divisors, whose sum is σ = 1775854080. Its totient is φ = 127370880.

The previous prime is 520151213. The next prime is 520151231. The reversal of 520151220 is 22151025.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 520151193 and 520151202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3970555 + ... + 3970685.

It is an arithmetic number, because the mean of its divisors is an integer number (6166160).

Almost surely, 2^520151220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520151220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (887927040).

520151220 is an abundant number, since it is smaller than the sum of its proper divisors (1255702860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520151220 is a wasteful number, since it uses less digits than its factorization.

520151220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 520151220 is about 22806.8239788007. The cubic root of 520151220 is about 804.2230946948.

It can be divided in two parts, 52015 and 1220, that added together give a palindrome (53235).

The spelling of 520151220 in words is "five hundred twenty million, one hundred fifty-one thousand, two hundred twenty".