133923216 has 40 divisors (see below), whose sum is σ = 395393344. Its totient is φ = 38263680.

The previous prime is 133923169. The next prime is 133923217. The reversal of 133923216 is 612329331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133923217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198955 + ... + 199626.

Almost surely, 2^133923216 is an apocalyptic number.

133923216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133923216 is an abundant number, since it is smaller than the sum of its proper divisors (261470128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133923216 is a wasteful number, since it uses less digits than its factorization.

133923216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398599 (or 398593 counting only the distinct ones).

The product of its digits is 5832, while the sum is 30.

The square root of 133923216 is about 11572.5198638844. The cubic root of 133923216 is about 511.6252343782.

The spelling of 133923216 in words is "one hundred thirty-three million, nine hundred twenty-three thousand, two hundred sixteen".