1215228417 has 8 divisors (see below), whose sum is σ = 1744943424. Its totient is φ = 747832848.

The previous prime is 1215228409. The next prime is 1215228451. The reversal of 1215228417 is 7148225121.

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

It is not a de Polignac number, because 1215228417 - 2³ = 1215228409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215228317) by changing a digit.

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, 15579813 + ... + 15579890.

It is an arithmetic number, because the mean of its divisors is an integer number (218117928).

Almost surely, 2^1215228417 is an apocalyptic number.

It is an amenable number.

1215228417 is a deficient number, since it is larger than the sum of its proper divisors (529715007).

1215228417 is a wasteful number, since it uses less digits than its factorization.

1215228417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31159719.

The product of its digits is 8960, while the sum is 33.

The square root of 1215228417 is about 34860.1264627654. The cubic root of 1215228417 is about 1067.1348558730.

The spelling of 1215228417 in words is "one billion, two hundred fifteen million, two hundred twenty-eight thousand, four hundred seventeen".