224224400421 has 32 divisors (see below), whose sum is σ = 401970919680. Its totient is φ = 120591272448.

The previous prime is 224224400399. The next prime is 224224400431. The reversal of 224224400421 is 124004422422.

It is not a de Polignac number, because 224224400421 - 2¹⁰ = 224224399397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224224400431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34890096 + ... + 34896521.

It is an arithmetic number, because the mean of its divisors is an integer number (12561591240).

Almost surely, 2^224224400421 is an apocalyptic number.

224224400421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

224224400421 is a deficient number, since it is larger than the sum of its proper divisors (177746519259).

224224400421 is a wasteful number, since it uses less digits than its factorization.

224224400421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69786650 (or 69786644 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 224224400421 its reverse (124004422422), we get a palindrome (348228822843).

The spelling of 224224400421 in words is "two hundred twenty-four billion, two hundred twenty-four million, four hundred thousand, four hundred twenty-one".