33157138 has 16 divisors (see below), whose sum is σ = 57346560. Its totient is φ = 14083776.

The previous prime is 33157133. The next prime is 33157141. The reversal of 33157138 is 83175133.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (33157133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8898 + ... + 12061.

It is an arithmetic number, because the mean of its divisors is an integer number (3584160).

Almost surely, 2^33157138 is an apocalyptic number.

33157138 is a deficient number, since it is larger than the sum of its proper divisors (24189422).

33157138 is a wasteful number, since it uses less digits than its factorization.

33157138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21081.

The product of its digits is 7560, while the sum is 31.

The square root of 33157138 is about 5758.2235107714. The cubic root of 33157138 is about 321.2617437303.

The spelling of 33157138 in words is "thirty-three million, one hundred fifty-seven thousand, one hundred thirty-eight".