1215663224402 has 32 divisors (see below), whose sum is σ = 2004811262784. Its totient is φ = 548257881600.

The previous prime is 1215663224401. The next prime is 1215663224437. The reversal of 1215663224402 is 2044223665121.

It is not an unprimeable number, because it can be changed into a prime (1215663224401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17467658 + ... + 17537114.

It is an arithmetic number, because the mean of its divisors is an integer number (62650351962).

Almost surely, 2^{1215663224402} is an apocalyptic number.

1215663224402 is a deficient number, since it is larger than the sum of its proper divisors (789148038382).

1215663224402 is a wasteful number, since it uses less digits than its factorization.

1215663224402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75674.

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 1215663224402 its reverse (2044223665121), we get a palindrome (3259886889523).

The spelling of 1215663224402 in words is "one trillion, two hundred fifteen billion, six hundred sixty-three million, two hundred twenty-four thousand, four hundred two".