1215551323342 has 16 divisors (see below), whose sum is σ = 1836506889360. Its totient is φ = 603395574208.

The previous prime is 1215551323321. The next prime is 1215551323367. The reversal of 1215551323342 is 2433231555121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3119167 + ... + 3487162.

It is an arithmetic number, because the mean of its divisors is an integer number (114781680585).

Almost surely, 2^{1215551323342} is an apocalyptic number.

1215551323342 is a deficient number, since it is larger than the sum of its proper divisors (620955566018).

1215551323342 is a wasteful number, since it uses less digits than its factorization.

1215551323342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6606995.

The product of its digits is 108000, while the sum is 37.

Adding to 1215551323342 its reverse (2433231555121), we get a palindrome (3648782878463).

The spelling of 1215551323342 in words is "one trillion, two hundred fifteen billion, five hundred fifty-one million, three hundred twenty-three thousand, three hundred forty-two".