133381935 has 24 divisors (see below), whose sum is σ = 231547680. Its totient is φ = 71028672.

The previous prime is 133381931. The next prime is 133381943. The reversal of 133381935 is 539183331.

It is a happy number.

It is not a de Polignac number, because 133381935 - 2² = 133381931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133381935.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133381931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34006 + ... + 37724.

It is an arithmetic number, because the mean of its divisors is an integer number (9647820).

Almost surely, 2^133381935 is an apocalyptic number.

133381935 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133381935 is a deficient number, since it is larger than the sum of its proper divisors (98165745).

133381935 is a wasteful number, since it uses less digits than its factorization.

133381935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4527 (or 4524 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 133381935 is about 11549.1097059470. The cubic root of 133381935 is about 510.9350205811.

The spelling of 133381935 in words is "one hundred thirty-three million, three hundred eighty-one thousand, nine hundred thirty-five".