221426331 has 8 divisors (see below), whose sum is σ = 337411584. Its totient is φ = 126529320.

The previous prime is 221426327. The next prime is 221426341. The reversal of 221426331 is 133624122.

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

It is not a de Polignac number, because 221426331 - 2² = 221426327 is a prime.

It is a super-2 number, since 2×221426331² = 98059240120243122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221426311) 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, 5272035 + ... + 5272076.

It is an arithmetic number, because the mean of its divisors is an integer number (42176448).

Almost surely, 2^221426331 is an apocalyptic number.

221426331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221426331 is a deficient number, since it is larger than the sum of its proper divisors (115985253).

221426331 is a wasteful number, since it uses less digits than its factorization.

221426331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10544121.

The product of its digits is 1728, while the sum is 24.

The square root of 221426331 is about 14880.4009018574. The cubic root of 221426331 is about 604.9828841093.

The spelling of 221426331 in words is "two hundred twenty-one million, four hundred twenty-six thousand, three hundred thirty-one".