133551812 has 6 divisors (see below), whose sum is σ = 233715678. Its totient is φ = 66775904.

The previous prime is 133551793. The next prime is 133551841. The reversal of 133551812 is 218155331.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 105185536 + 28366276 = 10256^2 + 5326^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 16693973 + ... + 16693980.

It is an arithmetic number, because the mean of its divisors is an integer number (38952613).

Almost surely, 2^133551812 is an apocalyptic number.

It is an amenable number.

133551812 is a deficient number, since it is larger than the sum of its proper divisors (100163866).

133551812 is a wasteful number, since it uses less digits than its factorization.

133551812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33387957 (or 33387955 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The square root of 133551812 is about 11556.4619153095. The cubic root of 133551812 is about 511.1518397636.

The spelling of 133551812 in words is "one hundred thirty-three million, five hundred fifty-one thousand, eight hundred twelve".