133720330 has 16 divisors (see below), whose sum is σ = 241552224. Its totient is φ = 53298000.

The previous prime is 133720303. The next prime is 133720333. The reversal of 133720330 is 33027331.

133720330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×133720330² = 35762253310617800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133720333) 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, 20796 + ... + 26455.

It is an arithmetic number, because the mean of its divisors is an integer number (15097014).

Almost surely, 2^133720330 is an apocalyptic number.

133720330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133720330 is a deficient number, since it is larger than the sum of its proper divisors (107831894).

133720330 is a wasteful number, since it uses less digits than its factorization.

133720330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47541.

The product of its (nonzero) digits is 1134, while the sum is 22.

The square root of 133720330 is about 11563.7506891147. The cubic root of 133720330 is about 511.3667428277.

Adding to 133720330 its reverse (33027331), we get a palindrome (166747661).

The spelling of 133720330 in words is "one hundred thirty-three million, seven hundred twenty thousand, three hundred thirty".