215243023 has 4 divisors (see below), whose sum is σ = 221060440. Its totient is φ = 209425608.

The previous prime is 215243009. The next prime is 215243047. The reversal of 215243023 is 320342512.

215243023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 215243023 - 2⁵ = 215242991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215242985 and 215243003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215243003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2908653 + ... + 2908726.

It is an arithmetic number, because the mean of its divisors is an integer number (55265110).

Almost surely, 2^215243023 is an apocalyptic number.

215243023 is a deficient number, since it is larger than the sum of its proper divisors (5817417).

215243023 is an equidigital number, since it uses as much as digits as its factorization.

215243023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5817416.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 215243023 is about 14671.1629736705. The cubic root of 215243023 is about 599.2982749937.

Adding to 215243023 its reverse (320342512), we get a palindrome (535585535).

The spelling of 215243023 in words is "two hundred fifteen million, two hundred forty-three thousand, twenty-three".