133216642 has 16 divisors (see below), whose sum is σ = 215442360. Its totient is φ = 61414272.

The previous prime is 133216637. The next prime is 133216649. The reversal of 133216642 is 246612331.

It can be written as a sum of positive squares in 4 ways, for example, as 112975641 + 20241001 = 10629^2 + 4499^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 133216642.

It is not an unprimeable number, because it can be changed into a prime (133216649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25398 + ... + 30190.

Almost surely, 2^133216642 is an apocalyptic number.

133216642 is a deficient number, since it is larger than the sum of its proper divisors (82225718).

133216642 is a wasteful number, since it uses less digits than its factorization.

133216642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5877.

The product of its digits is 5184, while the sum is 28.

The square root of 133216642 is about 11541.9513948032. The cubic root of 133216642 is about 510.7238753141.

Adding to 133216642 its reverse (246612331), we get a palindrome (379828973).

The spelling of 133216642 in words is "one hundred thirty-three million, two hundred sixteen thousand, six hundred forty-two".