31045231 has 8 divisors (see below), whose sum is σ = 35514144. Its totient is φ = 26584800.

The previous prime is 31045219. The next prime is 31045249. The reversal of 31045231 is 13254013.

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 31045231 - 2⁵ = 31045199 is a prime.

It is a super-2 number, since 2×31045231² = 1927612735686722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31045199 and 31045208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31045211) 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, 12141 + ... + 14473.

It is an arithmetic number, because the mean of its divisors is an integer number (4439268).

Almost surely, 2^31045231 is an apocalyptic number.

31045231 is a deficient number, since it is larger than the sum of its proper divisors (4468913).

31045231 is a wasteful number, since it uses less digits than its factorization.

31045231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4241.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 31045231 is about 5571.8247459876. The cubic root of 31045231 is about 314.2907735608.

Adding to 31045231 its reverse (13254013), we get a palindrome (44299244).

The spelling of 31045231 in words is "thirty-one million, forty-five thousand, two hundred thirty-one".