221455532345 has 8 divisors (see below), whose sum is σ = 265758304776. Its totient is φ = 177156648576.

The previous prime is 221455532297. The next prime is 221455532371. The reversal of 221455532345 is 543235554122.

It can be written as a sum of positive squares in 4 ways, for example, as 85692023824 + 135763508521 = 292732^2 + 368461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221455532345 - 2⁶ = 221455532281 is a prime.

It is a Duffinian 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, 845372 + ... + 1075901.

It is an arithmetic number, because the mean of its divisors is an integer number (33219788097).

Almost surely, 2^221455532345 is an apocalyptic number.

It is an amenable number.

221455532345 is a deficient number, since it is larger than the sum of its proper divisors (44302772431).

221455532345 is a wasteful number, since it uses less digits than its factorization.

221455532345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944331.

The product of its digits is 720000, while the sum is 41.

The spelling of 221455532345 in words is "two hundred twenty-one billion, four hundred fifty-five million, five hundred thirty-two thousand, three hundred forty-five".