215251223 has 4 divisors (see below), whose sum is σ = 234819528. Its totient is φ = 195682920.

The previous prime is 215251219. The next prime is 215251241. The reversal of 215251223 is 322152512.

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 215251223 - 2² = 215251219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215251243) 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, 9784136 + ... + 9784157.

It is an arithmetic number, because the mean of its divisors is an integer number (58704882).

Almost surely, 2^215251223 is an apocalyptic number.

215251223 is a deficient number, since it is larger than the sum of its proper divisors (19568305).

215251223 is a wasteful number, since it uses less digits than its factorization.

215251223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19568304.

The product of its digits is 1200, while the sum is 23.

The square root of 215251223 is about 14671.4424307905. The cubic root of 215251223 is about 599.3058852805.

The spelling of 215251223 in words is "two hundred fifteen million, two hundred fifty-one thousand, two hundred twenty-three".