133642243 has 8 divisors (see below), whose sum is σ = 153198080. Its totient is φ = 114202440.

The previous prime is 133642211. The next prime is 133642283. The reversal of 133642243 is 342246331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133642243 - 2⁵ = 133642211 is a prime.

It is a super-2 number, since 2×133642243² = 35720498228142098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133642283) 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, 26523 + ... + 31156.

It is an arithmetic number, because the mean of its divisors is an integer number (19149760).

Almost surely, 2^133642243 is an apocalyptic number.

133642243 is a deficient number, since it is larger than the sum of its proper divisors (19555837).

133642243 is an equidigital number, since it uses as much as digits as its factorization.

133642243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58017.

The product of its digits is 10368, while the sum is 28.

The square root of 133642243 is about 11560.3738261356. The cubic root of 133642243 is about 511.2671846177.

Adding to 133642243 its reverse (342246331), we get a palindrome (475888574).

The spelling of 133642243 in words is "one hundred thirty-three million, six hundred forty-two thousand, two hundred forty-three".