215123103 has 12 divisors (see below), whose sum is σ = 334636120. Its totient is φ = 132383376.

The previous prime is 215123101. The next prime is 215123123. The reversal of 215123103 is 301321512.

215123103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215123103 - 2¹ = 215123101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215123101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 919213 + ... + 919446.

Almost surely, 2^215123103 is an apocalyptic number.

215123103 is a deficient number, since it is larger than the sum of its proper divisors (119513017).

215123103 is a wasteful number, since it uses less digits than its factorization.

215123103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838678 (or 1838675 counting only the distinct ones).

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

The square root of 215123103 is about 14667.0754753632. The cubic root of 215123103 is about 599.1869570997.

Adding to 215123103 its reverse (301321512), we get a palindrome (516444615).

The spelling of 215123103 in words is "two hundred fifteen million, one hundred twenty-three thousand, one hundred three".