1216352403522 has 12 divisors (see below), whose sum is σ = 2635430207670. Its totient is φ = 405450801168.

The previous prime is 1216352403521. The next prime is 1216352403527. The reversal of 1216352403522 is 2253042536121.

1216352403522 is a `hidden beast` number, since 1 + 2 + 1 + 63 + 5 + 240 + 352 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1201213808001 + 15138595521 = 1095999^2 + 123039^2 .

It is not an unprimeable number, because it can be changed into a prime (1216352403521) 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 5 ways as a sum of consecutive naturals, for example, 33787566747 + ... + 33787566782.

Almost surely, 2^{1216352403522} is an apocalyptic number.

1216352403522 is an abundant number, since it is smaller than the sum of its proper divisors (1419077804148).

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

1216352403522 is a wasteful number, since it uses less digits than its factorization.

1216352403522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67575133537 (or 67575133534 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 1216352403522 its reverse (2253042536121), we get a palindrome (3469394939643).

The spelling of 1216352403522 in words is "one trillion, two hundred sixteen billion, three hundred fifty-two million, four hundred three thousand, five hundred twenty-two".