133243650 has 96 divisors (see below), whose sum is σ = 369619200. Its totient is φ = 35294400.

The previous prime is 133243633. The next prime is 133243651. The reversal of 133243650 is 56342331.

It is a happy number.

133243650 is a `hidden beast` number, since 1 + 3 + 3 + 2 + 4 + 3 + 650 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (133243651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 308935 + ... + 309365.

It is an arithmetic number, because the mean of its divisors is an integer number (3850200).

Almost surely, 2^133243650 is an apocalyptic number.

133243650 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 133243650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184809600).

133243650 is an abundant number, since it is smaller than the sum of its proper divisors (236375550).

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

133243650 is a wasteful number, since it uses less digits than its factorization.

133243650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 133243650 is about 11543.1213283063. The cubic root of 133243650 is about 510.7583872644.

Adding to 133243650 its reverse (56342331), we get a palindrome (189585981).

The spelling of 133243650 in words is "one hundred thirty-three million, two hundred forty-three thousand, six hundred fifty".