221061471 has 8 divisors (see below), whose sum is σ = 295209600. Its totient is φ = 147143832.

The previous prime is 221061443. The next prime is 221061479. The reversal of 221061471 is 174160122.

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

It is not a de Polignac number, because 221061471 - 2⁵ = 221061439 is a prime.

It is a super-3 number, since 3×221061471³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221061479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55371 + ... + 59228.

It is an arithmetic number, because the mean of its divisors is an integer number (36901200).

Almost surely, 2^221061471 is an apocalyptic number.

221061471 is a deficient number, since it is larger than the sum of its proper divisors (74148129).

221061471 is a wasteful number, since it uses less digits than its factorization.

221061471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115245.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 221061471 is about 14868.1360970365. The cubic root of 221061471 is about 604.6504102417.

The spelling of 221061471 in words is "two hundred twenty-one million, sixty-one thousand, four hundred seventy-one".