133211986 has 8 divisors (see below), whose sum is σ = 200027520. Its totient is φ = 66536148.

The previous prime is 133211977. The next prime is 133211987. The reversal of 133211986 is 689112331.

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

It is not an unprimeable number, because it can be changed into a prime (133211987) 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, 32506 + ... + 36373.

It is an arithmetic number, because the mean of its divisors is an integer number (25003440).

Almost surely, 2^133211986 is an apocalyptic number.

133211986 is a deficient number, since it is larger than the sum of its proper divisors (66815534).

133211986 is an equidigital number, since it uses as much as digits as its factorization.

133211986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69848.

The product of its digits is 7776, while the sum is 34.

The square root of 133211986 is about 11541.7496940455. The cubic root of 133211986 is about 510.7179252115.

The spelling of 133211986 in words is "one hundred thirty-three million, two hundred eleven thousand, nine hundred eighty-six".