133540650 has 144 divisors (see below), whose sum is σ = 385912800. Its totient is φ = 34292160.

The previous prime is 133540637. The next prime is 133540681. The reversal of 133540650 is 56045331.

133540650 is a `hidden beast` number, since 1 + 3 + 3 + 5 + 4 + 0 + 650 = 666.

It is a super-3 number, since 3×133540650³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 in 71 ways as a sum of consecutive naturals, for example, 352161 + ... + 352539.

It is an arithmetic number, because the mean of its divisors is an integer number (2679950).

Almost surely, 2^133540650 is an apocalyptic number.

133540650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133540650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192956400).

133540650 is an abundant number, since it is smaller than the sum of its proper divisors (252372150).

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

133540650 is a wasteful number, since it uses less digits than its factorization.

133540650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 133540650 is about 11555.9789719435. The cubic root of 133540650 is about 511.1375990088.

Adding to 133540650 its reverse (56045331), we get a palindrome (189585981).

The spelling of 133540650 in words is "one hundred thirty-three million, five hundred forty thousand, six hundred fifty".