215243422 has 4 divisors (see below), whose sum is σ = 322865136. Its totient is φ = 107621710.

The previous prime is 215243401. The next prime is 215243429. The reversal of 215243422 is 224342512.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 53810854 + ... + 53810857.

It is an arithmetic number, because the mean of its divisors is an integer number (80716284).

Almost surely, 2^215243422 is an apocalyptic number.

215243422 is a deficient number, since it is larger than the sum of its proper divisors (107621714).

215243422 is a wasteful number, since it uses less digits than its factorization.

215243422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107621713.

The product of its digits is 3840, while the sum is 25.

The square root of 215243422 is about 14671.1765717682. The cubic root of 215243422 is about 599.2986453036.

Adding to 215243422 its reverse (224342512), we get a palindrome (439585934).

The spelling of 215243422 in words is "two hundred fifteen million, two hundred forty-three thousand, four hundred twenty-two".