15561225350422 has 16 divisors (see below), whose sum is σ = 23374058475600. Its totient is φ = 7769875350240.

The previous prime is 15561225350381. The next prime is 15561225350441. The reversal of 15561225350422 is 22405352216551.

It is a super-4 number, since 4×15561225350422⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10374204 + ... + 11779072.

It is an arithmetic number, because the mean of its divisors is an integer number (1460878654725).

Almost surely, 2^{15561225350422} is an apocalyptic number.

15561225350422 is a deficient number, since it is larger than the sum of its proper divisors (7812833125178).

15561225350422 is a wasteful number, since it uses less digits than its factorization.

15561225350422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412511.

The product of its (nonzero) digits is 720000, while the sum is 43.

Adding to 15561225350422 its reverse (22405352216551), we get a palindrome (37966577566973).

The spelling of 15561225350422 in words is "fifteen trillion, five hundred sixty-one billion, two hundred twenty-five million, three hundred fifty thousand, four hundred twenty-two".