31140743 has 8 divisors (see below), whose sum is σ = 31977408. Its totient is φ = 30311424.

The previous prime is 31140727. The next prime is 31140749. The reversal of 31140743 is 34704113.

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 31140743 - 2⁴ = 31140727 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 (31140749) 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, 7355 + ... + 10787.

It is an arithmetic number, because the mean of its divisors is an integer number (3997176).

Almost surely, 2^31140743 is an apocalyptic number.

31140743 is a deficient number, since it is larger than the sum of its proper divisors (836665).

31140743 is a wasteful number, since it uses less digits than its factorization.

31140743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 31140743 is about 5580.3891441368. The cubic root of 31140743 is about 314.6127533245.

Adding to 31140743 its reverse (34704113), we get a palindrome (65844856).

The spelling of 31140743 in words is "thirty-one million, one hundred forty thousand, seven hundred forty-three".