1215553401422 has 32 divisors (see below), whose sum is σ = 1877931095040. Its totient is φ = 589772090880.

The previous prime is 1215553401407. The next prime is 1215553401431. The reversal of 1215553401422 is 2241043555121.

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 15 ways as a sum of consecutive naturals, for example, 9351854 + ... + 9480942.

It is an arithmetic number, because the mean of its divisors is an integer number (58685346720).

Almost surely, 2^{1215553401422} is an apocalyptic number.

1215553401422 is a deficient number, since it is larger than the sum of its proper divisors (662377693618).

1215553401422 is a wasteful number, since it uses less digits than its factorization.

1215553401422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129848.

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 1215553401422 its reverse (2241043555121), we get a palindrome (3456596956543).

The spelling of 1215553401422 in words is "one trillion, two hundred fifteen billion, five hundred fifty-three million, four hundred one thousand, four hundred twenty-two".