224232921 has 16 divisors (see below), whose sum is σ = 362397120. Its totient is φ = 135898560.

The previous prime is 224232893. The next prime is 224232923. The reversal of 224232921 is 129232422.

It is not a de Polignac number, because 224232921 - 2¹³ = 224224729 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (224232923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377200 + ... + 377793.

It is an arithmetic number, because the mean of its divisors is an integer number (22649820).

Almost surely, 2^224232921 is an apocalyptic number.

It is an amenable number.

224232921 is a deficient number, since it is larger than the sum of its proper divisors (138164199).

224232921 is a wasteful number, since it uses less digits than its factorization.

224232921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755013 (or 755007 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 224232921 is about 14974.4088698018. The cubic root of 224232921 is about 607.5282230448.

The spelling of 224232921 in words is "two hundred twenty-four million, two hundred thirty-two thousand, nine hundred twenty-one".