133213351 has 4 divisors (see below), whose sum is σ = 140224600. Its totient is φ = 126202104.

The previous prime is 133213349. The next prime is 133213363. The reversal of 133213351 is 153312331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 153312331 = 2393 ⋅64067.

It is not a de Polignac number, because 133213351 - 2¹ = 133213349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133213391) 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, 3505596 + ... + 3505633.

It is an arithmetic number, because the mean of its divisors is an integer number (35056150).

Almost surely, 2^133213351 is an apocalyptic number.

133213351 is a deficient number, since it is larger than the sum of its proper divisors (7011249).

133213351 is an equidigital number, since it uses as much as digits as its factorization.

133213351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7011248.

The product of its digits is 810, while the sum is 22.

The square root of 133213351 is about 11541.8088270427. The cubic root of 133213351 is about 510.7196696181.

Adding to 133213351 its reverse (153312331), we get a palindrome (286525682).

The spelling of 133213351 in words is "one hundred thirty-three million, two hundred thirteen thousand, three hundred fifty-one".