425521013 has 2 divisors, whose sum is σ = 425521014. Its totient is φ = 425521012.

The previous prime is 425520983. The next prime is 425521021. The reversal of 425521013 is 310125524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406143409 + 19377604 = 20153^2 + 4402^2 .

It is a cyclic number.

It is not a de Polignac number, because 425521013 - 2¹⁰ = 425519989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 425521013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425523013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212760506 + 212760507.

It is an arithmetic number, because the mean of its divisors is an integer number (212760507).

Almost surely, 2^425521013 is an apocalyptic number.

It is an amenable number.

425521013 is a deficient number, since it is larger than the sum of its proper divisors (1).

425521013 is an equidigital number, since it uses as much as digits as its factorization.

425521013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 425521013 is about 20628.1606790329. The cubic root of 425521013 is about 752.1544057518.

Adding to 425521013 its reverse (310125524), we get a palindrome (735646537).

The spelling of 425521013 in words is "four hundred twenty-five million, five hundred twenty-one thousand, thirteen".