224134821 has 12 divisors (see below), whose sum is σ = 325623948. Its totient is φ = 148558464.

The previous prime is 224134819. The next prime is 224134861. The reversal of 224134821 is 128431422.

It can be written as a sum of positive squares in 2 ways, for example, as 95062500 + 129072321 = 9750^2 + 11361^2 .

It is not a de Polignac number, because 224134821 - 2¹ = 224134819 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224134861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70420 + ... + 73533.

It is an arithmetic number, because the mean of its divisors is an integer number (27135329).

Almost surely, 2^224134821 is an apocalyptic number.

It is an amenable number.

224134821 is a deficient number, since it is larger than the sum of its proper divisors (101489127).

224134821 is a wasteful number, since it uses less digits than its factorization.

224134821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144132 (or 144129 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 224134821 is about 14971.1329230623. The cubic root of 224134821 is about 607.4396139744.

The spelling of 224134821 in words is "two hundred twenty-four million, one hundred thirty-four thousand, eight hundred twenty-one".