520220381 has 2 divisors, whose sum is σ = 520220382. Its totient is φ = 520220380.

The previous prime is 520220377. The next prime is 520220401. The reversal of 520220381 is 183022025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 481407481 + 38812900 = 21941^2 + 6230^2 .

It is a cyclic number.

It is not a de Polignac number, because 520220381 - 2² = 520220377 is a prime.

It is a super-2 number, since 2×520220381² = 541258489615570322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520220081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260110190 + 260110191.

It is an arithmetic number, because the mean of its divisors is an integer number (260110191).

Almost surely, 2^520220381 is an apocalyptic number.

It is an amenable number.

520220381 is a deficient number, since it is larger than the sum of its proper divisors (1).

520220381 is an equidigital number, since it uses as much as digits as its factorization.

520220381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 520220381 is about 22808.3401631947. The cubic root of 520220381 is about 804.2587371556.

The spelling of 520220381 in words is "five hundred twenty million, two hundred twenty thousand, three hundred eighty-one".