425522161 has 4 divisors (see below), whose sum is σ = 434575872. Its totient is φ = 416468452.

The previous prime is 425522147. The next prime is 425522171. The reversal of 425522161 is 161225524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 425522161 - 2⁵ = 425522129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425522171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4526785 + ... + 4526878.

It is an arithmetic number, because the mean of its divisors is an integer number (108643968).

Almost surely, 2^425522161 is an apocalyptic number.

It is an amenable number.

425522161 is a deficient number, since it is larger than the sum of its proper divisors (9053711).

425522161 is an equidigital number, since it uses as much as digits as its factorization.

425522161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9053710.

The product of its digits is 4800, while the sum is 28.

The square root of 425522161 is about 20628.1885050530. The cubic root of 425522161 is about 752.1550821559.

Adding to 425522161 its reverse (161225524), we get a palindrome (586747685).

The spelling of 425522161 in words is "four hundred twenty-five million, five hundred twenty-two thousand, one hundred sixty-one".