215451001222 has 8 divisors (see below), whose sum is σ = 323240652000. Its totient is φ = 107704117224.

The previous prime is 215451001193. The next prime is 215451001223. The reversal of 215451001222 is 222100154512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215451001223) 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, 10679097 + ... + 10699252.

It is an arithmetic number, because the mean of its divisors is an integer number (40405081500).

Almost surely, 2^215451001222 is an apocalyptic number.

215451001222 is a deficient number, since it is larger than the sum of its proper divisors (107789650778).

215451001222 is a wasteful number, since it uses less digits than its factorization.

215451001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21383390.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 215451001222 its reverse (222100154512), we get a palindrome (437551155734).

The spelling of 215451001222 in words is "two hundred fifteen billion, four hundred fifty-one million, one thousand, two hundred twenty-two".