520131449 has 2 divisors, whose sum is σ = 520131450. Its totient is φ = 520131448.

The previous prime is 520131427. The next prime is 520131461. The reversal of 520131449 is 944131025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261404224 + 258727225 = 16168^2 + 16085^2 .

It is a cyclic number.

It is not a de Polignac number, because 520131449 - 2¹⁶ = 520065913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (520131419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260065724 + 260065725.

It is an arithmetic number, because the mean of its divisors is an integer number (260065725).

Almost surely, 2^520131449 is an apocalyptic number.

It is an amenable number.

520131449 is a deficient number, since it is larger than the sum of its proper divisors (1).

520131449 is an equidigital number, since it uses as much as digits as its factorization.

520131449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 520131449 is about 22806.3905298493. The cubic root of 520131449 is about 804.2129050322.

The spelling of 520131449 in words is "five hundred twenty million, one hundred thirty-one thousand, four hundred forty-nine".