1215220014 has 24 divisors (see below), whose sum is σ = 2643476472. Its totient is φ = 403458000.

The previous prime is 1215219997. The next prime is 1215220021. The reversal of 1215220014 is 4100225121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129969 + ... + 139004.

It is an arithmetic number, because the mean of its divisors is an integer number (110144853).

Almost surely, 2^1215220014 is an apocalyptic number.

1215220014 is an abundant number, since it is smaller than the sum of its proper divisors (1428256458).

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

1215220014 is a wasteful number, since it uses less digits than its factorization.

1215220014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269232 (or 269229 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1215220014 is about 34860.0059380374. The cubic root of 1215220014 is about 1067.1323962106.

Adding to 1215220014 its reverse (4100225121), we get a palindrome (5315445135).

The spelling of 1215220014 in words is "one billion, two hundred fifteen million, two hundred twenty thousand, fourteen".