31849145 has 8 divisors (see below), whose sum is σ = 38590656. Its totient is φ = 25231536.

The previous prime is 31849141. The next prime is 31849157. The reversal of 31849145 is 54194813.

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 31849145 - 2² = 31849141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31849141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30407 + ... + 31436.

It is an arithmetic number, because the mean of its divisors is an integer number (4823832).

Almost surely, 2^31849145 is an apocalyptic number.

It is an amenable number.

31849145 is a deficient number, since it is larger than the sum of its proper divisors (6741511).

31849145 is a wasteful number, since it uses less digits than its factorization.

31849145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61951.

The product of its digits is 17280, while the sum is 35.

The square root of 31849145 is about 5643.5046735163. The cubic root of 31849145 is about 316.9805339876.

The spelling of 31849145 in words is "thirty-one million, eight hundred forty-nine thousand, one hundred forty-five".