425221051 has 4 divisors (see below), whose sum is σ = 450234072. Its totient is φ = 400208032.

The previous prime is 425221037. The next prime is 425221063. The reversal of 425221051 is 150122524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 425221051 - 2¹³ = 425212859 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425221001) 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 in 3 ways as a sum of consecutive naturals, for example, 12506485 + ... + 12506518.

It is an arithmetic number, because the mean of its divisors is an integer number (112558518).

Almost surely, 2^425221051 is an apocalyptic number.

425221051 is a deficient number, since it is larger than the sum of its proper divisors (25013021).

425221051 is a wasteful number, since it uses less digits than its factorization.

425221051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25013020.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 425221051 is about 20620.8887053880. Note that the first 3 decimals coincide. The cubic root of 425221051 is about 751.9776257820.

Adding to 425221051 its reverse (150122524), we get a palindrome (575343575).

The spelling of 425221051 in words is "four hundred twenty-five million, two hundred twenty-one thousand, fifty-one".