520215473 has 2 divisors, whose sum is σ = 520215474. Its totient is φ = 520215472.

The previous prime is 520215469. The next prime is 520215499. The reversal of 520215473 is 374512025.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 520204864 + 10609 = 22808^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 520215473 - 2² = 520215469 is a prime.

It is a super-2 number, since 2×520215473² = 541248276697227458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (520211473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260107736 + 260107737.

It is an arithmetic number, because the mean of its divisors is an integer number (260107737).

Almost surely, 2^520215473 is an apocalyptic number.

It is an amenable number.

520215473 is a deficient number, since it is larger than the sum of its proper divisors (1).

520215473 is an equidigital number, since it uses as much as digits as its factorization.

520215473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 520215473 is about 22808.2325707188. The cubic root of 520215473 is about 804.2562078979.

Adding to 520215473 its reverse (374512025), we get a palindrome (894727498).

The spelling of 520215473 in words is "five hundred twenty million, two hundred fifteen thousand, four hundred seventy-three".