221226907 has 8 divisors (see below), whose sum is σ = 242553600. Its totient is φ = 200102760.

The previous prime is 221226893. The next prime is 221226919. The reversal of 221226907 is 709622122.

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

It is not a de Polignac number, because 221226907 - 2⁷ = 221226779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221226977) 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, 48343 + ... + 52720.

It is an arithmetic number, because the mean of its divisors is an integer number (30319200).

Almost surely, 2^221226907 is an apocalyptic number.

221226907 is a deficient number, since it is larger than the sum of its proper divisors (21326693).

221226907 is a wasteful number, since it uses less digits than its factorization.

221226907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101273.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 221226907 is about 14873.6984976838. The cubic root of 221226907 is about 604.8012069134.

The spelling of 221226907 in words is "two hundred twenty-one million, two hundred twenty-six thousand, nine hundred seven".