215414243 has 6 divisors (see below), whose sum is σ = 236777772. Its totient is φ = 195831020.

The previous prime is 215414201. The next prime is 215414249. The reversal of 215414243 is 342414512.

It is not a de Polignac number, because 215414243 - 2¹⁴ = 215397859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215414249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 890021 + ... + 890262.

It is an arithmetic number, because the mean of its divisors is an integer number (39462962).

Almost surely, 2^215414243 is an apocalyptic number.

215414243 is a deficient number, since it is larger than the sum of its proper divisors (21363529).

215414243 is a wasteful number, since it uses less digits than its factorization.

215414243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780305 (or 1780294 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 215414243 is about 14676.9970702457. The cubic root of 215414243 is about 599.4571413964.

Adding to 215414243 its reverse (342414512), we get a palindrome (557828755).

The spelling of 215414243 in words is "two hundred fifteen million, four hundred fourteen thousand, two hundred forty-three".