225122421 has 8 divisors (see below), whose sum is σ = 300948480. Its totient is φ = 149688992.

The previous prime is 225122407. The next prime is 225122473. The reversal of 225122421 is 124221522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225122421 - 2¹³ = 225114229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225122221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96816 + ... + 99113.

It is an arithmetic number, because the mean of its divisors is an integer number (37618560).

Almost surely, 2^225122421 is an apocalyptic number.

It is an amenable number.

225122421 is a deficient number, since it is larger than the sum of its proper divisors (75826059).

225122421 is a wasteful number, since it uses less digits than its factorization.

225122421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196315.

The product of its digits is 640, while the sum is 21.

The square root of 225122421 is about 15004.0801450805. The cubic root of 225122421 is about 608.3304890758.

Adding to 225122421 its reverse (124221522), we get a palindrome (349343943).

The spelling of 225122421 in words is "two hundred twenty-five million, one hundred twenty-two thousand, four hundred twenty-one".