225211325421 has 16 divisors (see below), whose sum is σ = 302686404608. Its totient is φ = 148938879600.

The previous prime is 225211325419. The next prime is 225211325491. The reversal of 225211325421 is 124523112522.

It is not a de Polignac number, because 225211325421 - 2¹ = 225211325419 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 (225211325491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3177156 + ... + 3247266.

It is an arithmetic number, because the mean of its divisors is an integer number (18917900288).

Almost surely, 2^225211325421 is an apocalyptic number.

It is an amenable number.

225211325421 is a deficient number, since it is larger than the sum of its proper divisors (77475079187).

225211325421 is a wasteful number, since it uses less digits than its factorization.

225211325421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78672.

The product of its digits is 9600, while the sum is 30.

Adding to 225211325421 its reverse (124523112522), we get a palindrome (349734437943).

The spelling of 225211325421 in words is "two hundred twenty-five billion, two hundred eleven million, three hundred twenty-five thousand, four hundred twenty-one".