221540264612 has 6 divisors (see below), whose sum is σ = 387695463078. Its totient is φ = 110770132304.

The previous prime is 221540264609. The next prime is 221540264623. The reversal of 221540264612 is 216462045122.

It can be written as a sum of positive squares in only one way, i.e., 218029228096 + 3511036516 = 466936^2 + 59254^2 .

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 as a sum of consecutive naturals, namely, 27692533073 + ... + 27692533080.

It is an arithmetic number, because the mean of its divisors is an integer number (64615910513).

Almost surely, 2^221540264612 is an apocalyptic number.

It is an amenable number.

221540264612 is a deficient number, since it is larger than the sum of its proper divisors (166155198466).

221540264612 is a wasteful number, since it uses less digits than its factorization.

221540264612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55385066157 (or 55385066155 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 221540264612 in words is "two hundred twenty-one billion, five hundred forty million, two hundred sixty-four thousand, six hundred twelve".