31140123 has 8 divisors (see below), whose sum is σ = 47451648. Its totient is φ = 17794344.

The previous prime is 31140077. The next prime is 31140157. The reversal of 31140123 is 32104113.

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

It is a de Polignac number, because none of the positive numbers 2^k-31140123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31148123) 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, 741411 + ... + 741452.

It is an arithmetic number, because the mean of its divisors is an integer number (5931456).

Almost surely, 2^31140123 is an apocalyptic number.

31140123 is a deficient number, since it is larger than the sum of its proper divisors (16311525).

31140123 is a wasteful number, since it uses less digits than its factorization.

31140123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482873.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31140123 is about 5580.3335921789. Note that the first 3 decimals coincide. The cubic root of 31140123 is about 314.6106653718.

Adding to 31140123 its reverse (32104113), we get a palindrome (63244236).

The spelling of 31140123 in words is "thirty-one million, one hundred forty thousand, one hundred twenty-three".