31338541 has 4 divisors (see below), whose sum is σ = 33749212. Its totient is φ = 28927872.

The previous prime is 31338539. The next prime is 31338547. The reversal of 31338541 is 14583313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14583313 = 131 ⋅111323.

It can be written as a sum of positive squares in 2 ways, for example, as 2673225 + 28665316 = 1635^2 + 5354^2 .

It is a cyclic number.

It is not a de Polignac number, because 31338541 - 2¹ = 31338539 is a prime.

It is a super-3 number, since 3×31338541³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31338547) 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 3 ways as a sum of consecutive naturals, for example, 1205316 + ... + 1205341.

It is an arithmetic number, because the mean of its divisors is an integer number (8437303).

Almost surely, 2^31338541 is an apocalyptic number.

It is an amenable number.

31338541 is a deficient number, since it is larger than the sum of its proper divisors (2410671).

31338541 is a wasteful number, since it uses less digits than its factorization.

31338541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410670.

The product of its digits is 4320, while the sum is 28.

The square root of 31338541 is about 5598.0836899782. The cubic root of 31338541 is about 315.2774610839.

The spelling of 31338541 in words is "thirty-one million, three hundred thirty-eight thousand, five hundred forty-one".