221442341551562 has 4 divisors (see below), whose sum is σ = 332163512327346. Its totient is φ = 110721170775780.

The previous prime is 221442341551411. The next prime is 221442341551577. The reversal of 221442341551562 is 265155143244122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 216462923357041 + 4979418194521 = 14712679^2 + 2231461^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55360585387889 + ... + 55360585387892.

Almost surely, 2^{221442341551562} is an apocalyptic number.

221442341551562 is a deficient number, since it is larger than the sum of its proper divisors (110721170775784).

221442341551562 is a wasteful number, since it uses less digits than its factorization.

221442341551562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110721170775783.

The product of its digits is 2304000, while the sum is 47.

Adding to 221442341551562 its reverse (265155143244122), we get a palindrome (486597484795684).

The spelling of 221442341551562 in words is "two hundred twenty-one trillion, four hundred forty-two billion, three hundred forty-one million, five hundred fifty-one thousand, five hundred sixty-two".