221296473 has 12 divisors (see below), whose sum is σ = 319835568. Its totient is φ = 147445560.

The previous prime is 221296457. The next prime is 221296483. The reversal of 221296473 is 374692122.

221296473 is a `hidden beast` number, since 2 + 2 + 1 + 2 + 9 + 647 + 3 = 666.

It is not a de Polignac number, because 221296473 - 2⁴ = 221296457 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221296483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11986 + ... + 24212.

It is an arithmetic number, because the mean of its divisors is an integer number (26652964).

Almost surely, 2^221296473 is an apocalyptic number.

It is an amenable number.

221296473 is a deficient number, since it is larger than the sum of its proper divisors (98539095).

221296473 is a wasteful number, since it uses less digits than its factorization.

221296473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14244 (or 14241 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 221296473 is about 14876.0368714251. The cubic root of 221296473 is about 604.8645946089.

The spelling of 221296473 in words is "two hundred twenty-one million, two hundred ninety-six thousand, four hundred seventy-three".