133230918 has 32 divisors (see below), whose sum is σ = 271703520. Its totient is φ = 43545600.

The previous prime is 133230863. The next prime is 133230919. The reversal of 133230918 is 819032331.

It is a super-2 number, since 2×133230918² = 35500955022245448, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133230919) 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, 65046 + ... + 67062.

It is an arithmetic number, because the mean of its divisors is an integer number (8490735).

Almost surely, 2^133230918 is an apocalyptic number.

133230918 is an abundant number, since it is smaller than the sum of its proper divisors (138472602).

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

133230918 is a wasteful number, since it uses less digits than its factorization.

133230918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 133230918 is about 11542.5698178525. The cubic root of 133230918 is about 510.7421183642.

The spelling of 133230918 in words is "one hundred thirty-three million, two hundred thirty thousand, nine hundred eighteen".