133440224 has 12 divisors (see below), whose sum is σ = 262710504. Its totient is φ = 66720096.

The previous prime is 133440221. The next prime is 133440233. The reversal of 133440224 is 422044331.

It is a self number, because there is not a number n which added to its sum of digits gives 133440224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133440221) 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 as a sum of consecutive naturals, namely, 2084972 + ... + 2085035.

It is an arithmetic number, because the mean of its divisors is an integer number (21892542).

Almost surely, 2^133440224 is an apocalyptic number.

It is an amenable number.

133440224 is a deficient number, since it is larger than the sum of its proper divisors (129270280).

133440224 is an equidigital number, since it uses as much as digits as its factorization.

133440224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170017 (or 4170009 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 133440224 is about 11551.6329581579. The cubic root of 133440224 is about 511.0094373406.

Adding to 133440224 its reverse (422044331), we get a palindrome (555484555).

The spelling of 133440224 in words is "one hundred thirty-three million, four hundred forty thousand, two hundred twenty-four".