520551420 has 24 divisors (see below), whose sum is σ = 1457544144. Its totient is φ = 138813696.

The previous prime is 520551401. The next prime is 520551439. The reversal of 520551420 is 24155025.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (520551401) and next prime (520551439).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4337869 + ... + 4337988.

It is an arithmetic number, because the mean of its divisors is an integer number (60731006).

Almost surely, 2^520551420 is an apocalyptic number.

It is an amenable number.

520551420 is an abundant number, since it is smaller than the sum of its proper divisors (936992724).

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

520551420 is a wasteful number, since it uses less digits than its factorization.

520551420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8675869 (or 8675867 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 520551420 is about 22815.5959816964. The cubic root of 520551420 is about 804.4292959958.

The spelling of 520551420 in words is "five hundred twenty million, five hundred fifty-one thousand, four hundred twenty".