133931550 has 24 divisors (see below), whose sum is σ = 332150616. Its totient is φ = 35715040.

The previous prime is 133931521. The next prime is 133931557. The reversal of 133931550 is 55139331.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133931557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 446289 + ... + 446588.

It is an arithmetic number, because the mean of its divisors is an integer number (13839609).

Almost surely, 2^133931550 is an apocalyptic number.

133931550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133931550 is an abundant number, since it is smaller than the sum of its proper divisors (198219066).

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

133931550 is a wasteful number, since it uses less digits than its factorization.

133931550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892892 (or 892887 counting only the distinct ones).

The product of its (nonzero) digits is 6075, while the sum is 30.

The square root of 133931550 is about 11572.8799354353. The cubic root of 133931550 is about 511.6358469177.

The spelling of 133931550 in words is "one hundred thirty-three million, nine hundred thirty-one thousand, five hundred fifty".