215042222 has 4 divisors (see below), whose sum is σ = 322563336. Its totient is φ = 107521110.

The previous prime is 215042207. The next prime is 215042237. The reversal of 215042222 is 222240512.

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

It is an interprime number because it is at equal distance from previous prime (215042207) and next prime (215042237).

It is a junction number, because it is equal to n+sod(n) for n = 215042194 and 215042203.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 53760554 + ... + 53760557.

It is an arithmetic number, because the mean of its divisors is an integer number (80640834).

Almost surely, 2^215042222 is an apocalyptic number.

215042222 is a deficient number, since it is larger than the sum of its proper divisors (107521114).

215042222 is a wasteful number, since it uses less digits than its factorization.

215042222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107521113.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 215042222 is about 14664.3179861867. The cubic root of 215042222 is about 599.1118544965. Note that the first 3 decimals are identical.

Adding to 215042222 its reverse (222240512), we get a palindrome (437282734).

The spelling of 215042222 in words is "two hundred fifteen million, forty-two thousand, two hundred twenty-two".