123031215 has 12 divisors (see below), whose sum is σ = 213254184. Its totient is φ = 65616624.

The previous prime is 123031177. The next prime is 123031217. The reversal of 123031215 is 512130321.

It is not a de Polignac number, because 123031215 - 2⁶ = 123031151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123031217) 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 11 ways as a sum of consecutive naturals, for example, 1366969 + ... + 1367058.

It is an arithmetic number, because the mean of its divisors is an integer number (17771182).

Almost surely, 2^123031215 is an apocalyptic number.

123031215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123031215 is a deficient number, since it is larger than the sum of its proper divisors (90222969).

123031215 is a wasteful number, since it uses less digits than its factorization.

123031215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734038 (or 2734035 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 123031215 is about 11091.9436980179. The cubic root of 123031215 is about 497.3610497199.

Adding to 123031215 its reverse (512130321), we get a palindrome (635161536).

The spelling of 123031215 in words is "one hundred twenty-three million, thirty-one thousand, two hundred fifteen".