31230123 has 4 divisors (see below), whose sum is σ = 41640168. Its totient is φ = 20820080.

The previous prime is 31230079. The next prime is 31230163. The reversal of 31230123 is 32103213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31230123 - 2¹⁴ = 31213739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31230163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5205018 + ... + 5205023.

It is an arithmetic number, because the mean of its divisors is an integer number (10410042).

Almost surely, 2^31230123 is an apocalyptic number.

31230123 is a deficient number, since it is larger than the sum of its proper divisors (10410045).

31230123 is a wasteful number, since it uses less digits than its factorization.

31230123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10410044.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 31230123 is about 5588.3918080249. The cubic root of 31230123 is about 314.9134657742.

Adding to 31230123 its reverse (32103213), we get a palindrome (63333336).

The spelling of 31230123 in words is "thirty-one million, two hundred thirty thousand, one hundred twenty-three".