33331139 has 2 divisors, whose sum is σ = 33331140. Its totient is φ = 33331138.

The previous prime is 33331099. The next prime is 33331153. The reversal of 33331139 is 93113333.

It is a strong prime.

It is an emirp because it is prime and its reverse (93113333) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33331139 - 2¹² = 33327043 is a prime.

It is a super-2 number, since 2×33331139² = 2221929654074642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33391139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16665569 + 16665570.

It is an arithmetic number, because the mean of its divisors is an integer number (16665570).

Almost surely, 2^33331139 is an apocalyptic number.

33331139 is a deficient number, since it is larger than the sum of its proper divisors (1).

33331139 is an equidigital number, since it uses as much as digits as its factorization.

33331139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2187, while the sum is 26.

The square root of 33331139 is about 5773.3126539276. The cubic root of 33331139 is about 321.8227326951.

The spelling of 33331139 in words is "thirty-three million, three hundred thirty-one thousand, one hundred thirty-nine".