31041091 has 4 divisors (see below), whose sum is σ = 31079632. Its totient is φ = 31002552.

The previous prime is 31041089. The next prime is 31041121. The reversal of 31041091 is 19014013.

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: 19014013 = 71 ⋅267803.

It is a cyclic number.

It is not a de Polignac number, because 31041091 - 2¹ = 31041089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31041061) 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, 18036 + ... + 19681.

It is an arithmetic number, because the mean of its divisors is an integer number (7769908).

Almost surely, 2^31041091 is an apocalyptic number.

31041091 is a deficient number, since it is larger than the sum of its proper divisors (38541).

31041091 is an equidigital number, since it uses as much as digits as its factorization.

31041091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38540.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 31041091 is about 5571.4532215572. The cubic root of 31041091 is about 314.2768023152.

The spelling of 31041091 in words is "thirty-one million, forty-one thousand, ninety-one".