31338133 has 4 divisors (see below), whose sum is σ = 31354380. Its totient is φ = 31321888.

The previous prime is 31338101. The next prime is 31338161. The reversal of 31338133 is 33183313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24820324 + 6517809 = 4982^2 + 2553^2 .

It is a cyclic number.

It is not a de Polignac number, because 31338133 - 2⁵ = 31338101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31338098 and 31338107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31338173) 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, 4768 + ... + 9241.

It is an arithmetic number, because the mean of its divisors is an integer number (7838595).

Almost surely, 2^31338133 is an apocalyptic number.

It is an amenable number.

31338133 is a deficient number, since it is larger than the sum of its proper divisors (16247).

31338133 is a wasteful number, since it uses less digits than its factorization.

31338133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16246.

The product of its digits is 1944, while the sum is 25.

The square root of 31338133 is about 5598.0472488181. The cubic root of 31338133 is about 315.2760928670.

The spelling of 31338133 in words is "thirty-one million, three hundred thirty-eight thousand, one hundred thirty-three".