31138033 has 8 divisors (see below), whose sum is σ = 33291648. Its totient is φ = 29020224.

The previous prime is 31138013. The next prime is 31138039. The reversal of 31138033 is 33083113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31138033 - 2⁵ = 31138001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31137995 and 31138013.

It is not an unprimeable number, because it can be changed into a prime (31138039) 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, 7141 + ... + 10642.

It is an arithmetic number, because the mean of its divisors is an integer number (4161456).

Almost surely, 2^31138033 is an apocalyptic number.

It is an amenable number.

31138033 is a deficient number, since it is larger than the sum of its proper divisors (2153615).

31138033 is a wasteful number, since it uses less digits than its factorization.

31138033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17903.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 31138033 is about 5580.1463242463. The cubic root of 31138033 is about 314.6036267462.

The spelling of 31138033 in words is "thirty-one million, one hundred thirty-eight thousand, thirty-three".