133640211 has 4 divisors (see below), whose sum is σ = 178186952. Its totient is φ = 89093472.

The previous prime is 133640201. The next prime is 133640219. The reversal of 133640211 is 112046331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112046331 = 3 ⋅37348777.

It is not a de Polignac number, because 133640211 - 2²³ = 125251603 is a prime.

It is a super-2 number, since 2×133640211² = 35719411992249042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133640219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22273366 + ... + 22273371.

It is an arithmetic number, because the mean of its divisors is an integer number (44546738).

Almost surely, 2^133640211 is an apocalyptic number.

133640211 is a deficient number, since it is larger than the sum of its proper divisors (44546741).

133640211 is an equidigital number, since it uses as much as digits as its factorization.

133640211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44546740.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 133640211 is about 11560.2859393702. The cubic root of 133640211 is about 511.2645933707.

Adding to 133640211 its reverse (112046331), we get a palindrome (245686542).

The spelling of 133640211 in words is "one hundred thirty-three million, six hundred forty thousand, two hundred eleven".