133881956 has 12 divisors (see below), whose sum is σ = 252316092. Its totient is φ = 61791648.

The previous prime is 133881929. The next prime is 133881971. The reversal of 133881956 is 659188331.

It can be written as a sum of positive squares in 2 ways, for example, as 11115556 + 122766400 = 3334^2 + 11080^2 .

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, 1287275 + ... + 1287378.

It is an arithmetic number, because the mean of its divisors is an integer number (21026341).

Almost surely, 2^133881956 is an apocalyptic number.

It is an amenable number.

133881956 is a deficient number, since it is larger than the sum of its proper divisors (118434136).

133881956 is a wasteful number, since it uses less digits than its factorization.

133881956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574670 (or 2574668 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 133881956 is about 11570.7370551750. The cubic root of 133881956 is about 511.5726872893.

The spelling of 133881956 in words is "one hundred thirty-three million, eight hundred eighty-one thousand, nine hundred fifty-six".