1215440214 has 16 divisors (see below), whose sum is σ = 2460169152. Its totient is φ = 400265288.

The previous prime is 1215440207. The next prime is 1215440231. The reversal of 1215440214 is 4120445121.

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 in 7 ways as a sum of consecutive naturals, for example, 1219824 + ... + 1220819.

It is an arithmetic number, because the mean of its divisors is an integer number (153760572).

Almost surely, 2^1215440214 is an apocalyptic number.

1215440214 is an abundant number, since it is smaller than the sum of its proper divisors (1244728938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215440214 is a wasteful number, since it uses less digits than its factorization.

1215440214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440731.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 1215440214 is about 34863.1641421142. The cubic root of 1215440214 is about 1067.1968477390.

Adding to 1215440214 its reverse (4120445121), we get a palindrome (5335885335).

The spelling of 1215440214 in words is "one billion, two hundred fifteen million, four hundred forty thousand, two hundred fourteen".