133431224 has 16 divisors (see below), whose sum is σ = 263351400. Its totient is φ = 63204192.

The previous prime is 133431197. The next prime is 133431227. The reversal of 133431224 is 422134331.

It is a self number, because there is not a number n which added to its sum of digits gives 133431224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133431227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438767 + ... + 439070.

Almost surely, 2^133431224 is an apocalyptic number.

It is an amenable number.

133431224 is a deficient number, since it is larger than the sum of its proper divisors (129920176).

133431224 is a wasteful number, since it uses less digits than its factorization.

133431224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877862 (or 877858 counting only the distinct ones).

The product of its digits is 1728, while the sum is 23.

The square root of 133431224 is about 11551.2433962756. The cubic root of 133431224 is about 510.9979485801.

Adding to 133431224 its reverse (422134331), we get a palindrome (555565555).

The spelling of 133431224 in words is "one hundred thirty-three million, four hundred thirty-one thousand, two hundred twenty-four".