224402121 has 6 divisors (see below), whose sum is σ = 324136410. Its totient is φ = 149601408.

The previous prime is 224402051. The next prime is 224402177. The reversal of 224402121 is 121204422.

It can be written as a sum of positive squares in only one way, i.e., 137241225 + 87160896 = 11715^2 + 9336^2 .

It is not a de Polignac number, because 224402121 - 2¹⁰ = 224401097 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 224402094 and 224402103.

It is not an unprimeable number, because it can be changed into a prime (224403121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12466776 + ... + 12466793.

It is an arithmetic number, because the mean of its divisors is an integer number (54022735).

Almost surely, 2^224402121 is an apocalyptic number.

It is an amenable number.

224402121 is a deficient number, since it is larger than the sum of its proper divisors (99734289).

224402121 is a wasteful number, since it uses less digits than its factorization.

224402121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24933575 (or 24933572 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 224402121 is about 14980.0574431475. The cubic root of 224402121 is about 607.6809926599.

Adding to 224402121 its reverse (121204422), we get a palindrome (345606543).

The spelling of 224402121 in words is "two hundred twenty-four million, four hundred two thousand, one hundred twenty-one".