133581468 has 12 divisors (see below), whose sum is σ = 311690120. Its totient is φ = 44527152.

The previous prime is 133581397. The next prime is 133581479. The reversal of 133581468 is 864185331.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5565883 + ... + 5565906.

Almost surely, 2^133581468 is an apocalyptic number.

It is an amenable number.

133581468 is an abundant number, since it is smaller than the sum of its proper divisors (178108652).

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

133581468 is a wasteful number, since it uses less digits than its factorization.

133581468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11131796 (or 11131794 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 133581468 is about 11557.7449357563. The cubic root of 133581468 is about 511.1896717651.

The spelling of 133581468 in words is "one hundred thirty-three million, five hundred eighty-one thousand, four hundred sixty-eight".