221053400552 has 8 divisors (see below), whose sum is σ = 414475126050. Its totient is φ = 110526700272.

The previous prime is 221053400543. The next prime is 221053400593. The reversal of 221053400552 is 255004350122.

It can be written as a sum of positive squares in only one way, i.e., 169090374436 + 51963026116 = 411206^2 + 227954^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13815837527 + ... + 13815837542.

Almost surely, 2^221053400552 is an apocalyptic number.

It is an amenable number.

221053400552 is a deficient number, since it is larger than the sum of its proper divisors (193421725498).

221053400552 is a wasteful number, since it uses less digits than its factorization.

221053400552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27631675075 (or 27631675071 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 221053400552 its reverse (255004350122), we get a palindrome (476057750674).

The spelling of 221053400552 in words is "two hundred twenty-one billion, fifty-three million, four hundred thousand, five hundred fifty-two".