31345123 has 8 divisors (see below), whose sum is σ = 32420736. Its totient is φ = 30273600.

The previous prime is 31345121. The next prime is 31345141. The reversal of 31345123 is 32154313.

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 31345123 - 2¹ = 31345121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31345094 and 31345103.

It is not an unprimeable number, because it can be changed into a prime (31345121) 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, 29013 + ... + 30073.

It is an arithmetic number, because the mean of its divisors is an integer number (4052592).

Almost surely, 2^31345123 is an apocalyptic number.

31345123 is a deficient number, since it is larger than the sum of its proper divisors (1075613).

31345123 is a wasteful number, since it uses less digits than its factorization.

31345123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045.

The product of its digits is 1080, while the sum is 22.

The square root of 31345123 is about 5598.6715388563. The cubic root of 31345123 is about 315.2995320006.

Adding to 31345123 its reverse (32154313), we get a palindrome (63499436).

The spelling of 31345123 in words is "thirty-one million, three hundred forty-five thousand, one hundred twenty-three".