425133221 has 12 divisors (see below), whose sum is σ = 436389408. Its totient is φ = 414068184.

The previous prime is 425133211. The next prime is 425133253. The reversal of 425133221 is 122331524.

It is a de Polignac number, because none of the positive numbers 2^k-425133221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425133211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1906316 + ... + 1906538.

It is an arithmetic number, because the mean of its divisors is an integer number (36365784).

Almost surely, 2^425133221 is an apocalyptic number.

It is an amenable number.

425133221 is a deficient number, since it is larger than the sum of its proper divisors (11256187).

425133221 is an equidigital number, since it uses as much as digits as its factorization.

425133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 409 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 425133221 is about 20618.7589587734. The cubic root of 425133221 is about 751.9258482085.

Adding to 425133221 its reverse (122331524), we get a palindrome (547464745).

The spelling of 425133221 in words is "four hundred twenty-five million, one hundred thirty-three thousand, two hundred twenty-one".