42520163401 has 2 divisors, whose sum is σ = 42520163402. Its totient is φ = 42520163400.

The previous prime is 42520163393. The next prime is 42520163461. The reversal of 42520163401 is 10436102524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36510037776 + 6010125625 = 191076^2 + 77525^2 .

It is a cyclic number.

It is not a de Polignac number, because 42520163401 - 2³ = 42520163393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42520163401.

It is not a weakly prime, because it can be changed into another prime (42520163461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21260081700 + 21260081701.

It is an arithmetic number, because the mean of its divisors is an integer number (21260081701).

Almost surely, 2^42520163401 is an apocalyptic number.

It is an amenable number.

42520163401 is a deficient number, since it is larger than the sum of its proper divisors (1).

42520163401 is an equidigital number, since it uses as much as digits as its factorization.

42520163401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 42520163401 its reverse (10436102524), we get a palindrome (52956265925).

The spelling of 42520163401 in words is "forty-two billion, five hundred twenty million, one hundred sixty-three thousand, four hundred one".