133233985 has 16 divisors (see below), whose sum is σ = 170674560. Its totient is φ = 99550080.

The previous prime is 133233983. The next prime is 133234019. The reversal of 133233985 is 589332331.

It is not a de Polignac number, because 133233985 - 2¹ = 133233983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133233983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3132 + ... + 16621.

It is an arithmetic number, because the mean of its divisors is an integer number (10667160).

Almost surely, 2^133233985 is an apocalyptic number.

It is an amenable number.

133233985 is a deficient number, since it is larger than the sum of its proper divisors (37440575).

133233985 is a wasteful number, since it uses less digits than its factorization.

133233985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19848.

The product of its digits is 58320, while the sum is 37.

The square root of 133233985 is about 11542.7026731178. The cubic root of 133233985 is about 510.7460374597.

The spelling of 133233985 in words is "one hundred thirty-three million, two hundred thirty-three thousand, nine hundred eighty-five".