225236421001 has 4 divisors (see below), whose sum is σ = 225916893904. Its totient is φ = 224555948100.

The previous prime is 225236420999. The next prime is 225236421017. The reversal of 225236421001 is 100124632522.

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 225236421001 - 2¹ = 225236420999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225236421061) 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, 340235955 + ... + 340236616.

It is an arithmetic number, because the mean of its divisors is an integer number (56479223476).

Almost surely, 2^225236421001 is an apocalyptic number.

It is an amenable number.

225236421001 is a deficient number, since it is larger than the sum of its proper divisors (680472903).

225236421001 is an equidigital number, since it uses as much as digits as its factorization.

225236421001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680472902.

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 225236421001 in words is "two hundred twenty-five billion, two hundred thirty-six million, four hundred twenty-one thousand, one".