215243423 has 16 divisors (see below), whose sum is σ = 230234400. Its totient is φ = 200860800.

The previous prime is 215243401. The next prime is 215243429. The reversal of 215243423 is 324342512.

It is a cyclic number.

It is not a de Polignac number, because 215243423 - 2¹² = 215239327 is a prime.

It is a super-2 number, since 2×215243423² = 92659462289513858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215243392 and 215243401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215243429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125093 + ... + 126801.

It is an arithmetic number, because the mean of its divisors is an integer number (14389650).

Almost surely, 2^215243423 is an apocalyptic number.

215243423 is a deficient number, since it is larger than the sum of its proper divisors (14990977).

215243423 is a wasteful number, since it uses less digits than its factorization.

215243423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882.

The product of its digits is 5760, while the sum is 26.

The square root of 215243423 is about 14671.1766058486. The cubic root of 215243423 is about 599.2986462317.

Adding to 215243423 its reverse (324342512), we get a palindrome (539585935).

The spelling of 215243423 in words is "two hundred fifteen million, two hundred forty-three thousand, four hundred twenty-three".