520423451 has 2 divisors, whose sum is σ = 520423452. Its totient is φ = 520423450.

The previous prime is 520423447. The next prime is 520423469. The reversal of 520423451 is 154324025.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520423451 - 2² = 520423447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520423451.

It is not a weakly prime, because it can be changed into another prime (520423411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260211725 + 260211726.

It is an arithmetic number, because the mean of its divisors is an integer number (260211726).

Almost surely, 2^520423451 is an apocalyptic number.

520423451 is a deficient number, since it is larger than the sum of its proper divisors (1).

520423451 is an equidigital number, since it uses as much as digits as its factorization.

520423451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 520423451 is about 22812.7913899198. The cubic root of 520423451 is about 804.3633720253.

Adding to 520423451 its reverse (154324025), we get a palindrome (674747476).

The spelling of 520423451 in words is "five hundred twenty million, four hundred twenty-three thousand, four hundred fifty-one".