31990541 has 8 divisors (see below), whose sum is σ = 35391168. Its totient is φ = 28672000.

The previous prime is 31990529. The next prime is 31990561. The reversal of 31990541 is 14509913.

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

It is a cyclic number.

It is not a de Polignac number, because 31990541 - 2¹⁴ = 31974157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31990498 and 31990507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31990501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19700 + ... + 21261.

It is an arithmetic number, because the mean of its divisors is an integer number (4423896).

Almost surely, 2^31990541 is an apocalyptic number.

It is an amenable number.

31990541 is a deficient number, since it is larger than the sum of its proper divisors (3400627).

31990541 is a wasteful number, since it uses less digits than its factorization.

31990541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41043.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 31990541 is about 5656.0181223189. The cubic root of 31990541 is about 317.4489255889.

The spelling of 31990541 in words is "thirty-one million, nine hundred ninety thousand, five hundred forty-one".