133223331 has 8 divisors (see below), whose sum is σ = 181762240. Its totient is φ = 86749992.

The previous prime is 133223317. The next prime is 133223341. The reversal of 133223331 is 133322331.

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

It is not a de Polignac number, because 133223331 - 2¹³ = 133215139 is a prime.

It is a super-2 number, since 2×133223331² = 35496911845471122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133223298 and 133223307.

It is not an unprimeable number, because it can be changed into a prime (133223341) 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, 516241 + ... + 516498.

It is an arithmetic number, because the mean of its divisors is an integer number (22720280).

Almost surely, 2^133223331 is an apocalyptic number.

133223331 is a deficient number, since it is larger than the sum of its proper divisors (48538909).

133223331 is a wasteful number, since it uses less digits than its factorization.

133223331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032785.

The product of its digits is 972, while the sum is 21.

The square root of 133223331 is about 11542.2411601907. The cubic root of 133223331 is about 510.7324232322.

Adding to 133223331 its reverse (133322331), we get a palindrome (266545662).

It can be divided in two parts, 13322 and 3331, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 133223331 in words is "one hundred thirty-three million, two hundred twenty-three thousand, three hundred thirty-one".