133213423 has 8 divisors (see below), whose sum is σ = 154078848. Its totient is φ = 112806744.

The previous prime is 133213397. The next prime is 133213471. The reversal of 133213423 is 324312331.

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 133213423 - 2⁵ = 133213391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133213394 and 133213403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133219423) 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, 114061 + ... + 115222.

It is an arithmetic number, because the mean of its divisors is an integer number (19259856).

Almost surely, 2^133213423 is an apocalyptic number.

133213423 is a deficient number, since it is larger than the sum of its proper divisors (20865425).

133213423 is an equidigital number, since it uses as much as digits as its factorization.

133213423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229373.

The product of its digits is 1296, while the sum is 22.

The square root of 133213423 is about 11541.8119461374. The cubic root of 133213423 is about 510.7197616304.

Adding to 133213423 its reverse (324312331), we get a palindrome (457525754).

The spelling of 133213423 in words is "one hundred thirty-three million, two hundred thirteen thousand, four hundred twenty-three".