133221745 has 16 divisors (see below), whose sum is σ = 162489600. Its totient is φ = 104842944.

The previous prime is 133221733. The next prime is 133221757. The reversal of 133221745 is 547122331.

It is an interprime number because it is at equal distance from previous prime (133221733) and next prime (133221757).

It is a cyclic number.

It is not a de Polignac number, because 133221745 - 2⁷ = 133221617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85231 + ... + 86779.

It is an arithmetic number, because the mean of its divisors is an integer number (10155600).

Almost surely, 2^133221745 is an apocalyptic number.

It is an amenable number.

133221745 is a deficient number, since it is larger than the sum of its proper divisors (29267855).

133221745 is a wasteful number, since it uses less digits than its factorization.

133221745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824.

The product of its digits is 5040, while the sum is 28.

The square root of 133221745 is about 11542.1724558248. The cubic root of 133221745 is about 510.7303964980.

The spelling of 133221745 in words is "one hundred thirty-three million, two hundred twenty-one thousand, seven hundred forty-five".