215255243 has 8 divisors (see below), whose sum is σ = 246943488. Its totient is φ = 183801384.

The previous prime is 215255239. The next prime is 215255251. The reversal of 215255243 is 342552512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215255243 - 2² = 215255239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215255203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56621 + ... + 60302.

It is an arithmetic number, because the mean of its divisors is an integer number (30867936).

Almost surely, 2^215255243 is an apocalyptic number.

215255243 is a deficient number, since it is larger than the sum of its proper divisors (31688245).

215255243 is a wasteful number, since it uses less digits than its factorization.

215255243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117193.

The product of its digits is 12000, while the sum is 29.

The square root of 215255243 is about 14671.5794309952. The cubic root of 215255243 is about 599.3096161067.

The spelling of 215255243 in words is "two hundred fifteen million, two hundred fifty-five thousand, two hundred forty-three".