31042191 has 8 divisors (see below), whose sum is σ = 42724864. Its totient is φ = 20027160.

The previous prime is 31042177. The next prime is 31042199. The reversal of 31042191 is 19124013.

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

It is not a de Polignac number, because 31042191 - 2⁵ = 31042159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31042199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166801 + ... + 166986.

It is an arithmetic number, because the mean of its divisors is an integer number (5340608).

Almost surely, 2^31042191 is an apocalyptic number.

31042191 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31042191 is a deficient number, since it is larger than the sum of its proper divisors (11682673).

31042191 is a wasteful number, since it uses less digits than its factorization.

31042191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333821.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 31042191 is about 5571.5519381946. The cubic root of 31042191 is about 314.2805146031.

The spelling of 31042191 in words is "thirty-one million, forty-two thousand, one hundred ninety-one".