133261056 has 54 divisors (see below), whose sum is σ = 384231120. Its totient is φ = 44419584.

The previous prime is 133261049. The next prime is 133261081. The reversal of 133261056 is 650162331.

133261056 is a `hidden beast` number, since 13 + 32 + 610 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 26616 + ... + 31223.

Almost surely, 2^133261056 is an apocalyptic number.

133261056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133261056 is an abundant number, since it is smaller than the sum of its proper divisors (250970064).

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

133261056 is an equidigital number, since it uses as much as digits as its factorization.

133261056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57861 (or 57844 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 133261056 is about 11543.8752592013. The cubic root of 133261056 is about 510.7806269068.

The spelling of 133261056 in words is "one hundred thirty-three million, two hundred sixty-one thousand, fifty-six".