425530212161 has 2 divisors, whose sum is σ = 425530212162. Its totient is φ = 425530212160.

The previous prime is 425530212127. The next prime is 425530212181. The reversal of 425530212161 is 161212035524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 411835361536 + 13694850625 = 641744^2 + 117025^2 .

It is a cyclic number.

It is not a de Polignac number, because 425530212161 - 2⁶ = 425530212097 is a prime.

It is a super-2 number, since 2×425530212161² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (425530212181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212765106080 + 212765106081.

It is an arithmetic number, because the mean of its divisors is an integer number (212765106081).

Almost surely, 2^425530212161 is an apocalyptic number.

It is an amenable number.

425530212161 is a deficient number, since it is larger than the sum of its proper divisors (1).

425530212161 is an equidigital number, since it uses as much as digits as its factorization.

425530212161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 425530212161 its reverse (161212035524), we get a palindrome (586742247685).

The spelling of 425530212161 in words is "four hundred twenty-five billion, five hundred thirty million, two hundred twelve thousand, one hundred sixty-one".