33312137 has 4 divisors (see below), whose sum is σ = 33341076. Its totient is φ = 33283200.

The previous prime is 33312127. The next prime is 33312151. The reversal of 33312137 is 73121333.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73121333 = 239 ⋅305947.

It can be written as a sum of positive squares in 2 ways, for example, as 11587216 + 21724921 = 3404^2 + 4661^2 .

It is a cyclic number.

It is not a de Polignac number, because 33312137 - 2¹⁸ = 33049993 is a prime.

It is a super-2 number, since 2×33312137² = 2219396943013538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33312127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12668 + ... + 15069.

It is an arithmetic number, because the mean of its divisors is an integer number (8335269).

Almost surely, 2^33312137 is an apocalyptic number.

It is an amenable number.

33312137 is a deficient number, since it is larger than the sum of its proper divisors (28939).

33312137 is a wasteful number, since it uses less digits than its factorization.

33312137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28938.

The product of its digits is 1134, while the sum is 23.

The square root of 33312137 is about 5771.6667436712. Note that the first 3 decimals coincide. The cubic root of 33312137 is about 321.7615642880.

The spelling of 33312137 in words is "thirty-three million, three hundred twelve thousand, one hundred thirty-seven".