133720355 has 4 divisors (see below), whose sum is σ = 160464432. Its totient is φ = 106976280.

The previous prime is 133720337. The next prime is 133720369. The reversal of 133720355 is 553027331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553027331 = 373 ⋅1482647.

It is not a de Polignac number, because 133720355 - 2⁶ = 133720291 is a prime.

It is a super-2 number, since 2×133720355² = 35762266682652050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13372031 + ... + 13372040.

It is an arithmetic number, because the mean of its divisors is an integer number (40116108).

Almost surely, 2^133720355 is an apocalyptic number.

133720355 is a deficient number, since it is larger than the sum of its proper divisors (26744077).

133720355 is an equidigital number, since it uses as much as digits as its factorization.

133720355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26744076.

The product of its (nonzero) digits is 9450, while the sum is 29.

The square root of 133720355 is about 11563.7517700788. The cubic root of 133720355 is about 511.3667746956.

Adding to 133720355 its reverse (553027331), we get a palindrome (686747686).

The spelling of 133720355 in words is "one hundred thirty-three million, seven hundred twenty thousand, three hundred fifty-five".