221234375 has 14 divisors (see below), whose sum is σ = 276558960. Its totient is φ = 176975000.

The previous prime is 221234371. The next prime is 221234393. The reversal of 221234375 is 573432122.

It is not a de Polignac number, because 221234375 - 2² = 221234371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221234371) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 8546 + ... + 22704.

Almost surely, 2^221234375 is an apocalyptic number.

221234375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

221234375 is a deficient number, since it is larger than the sum of its proper divisors (55324585).

221234375 is an frugal number, since it uses more digits than its factorization.

221234375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14189 (or 14164 counting only the distinct ones).

The product of its digits is 10080, while the sum is 29.

The square root of 221234375 is about 14873.9495427408. The cubic root of 221234375 is about 604.8080123011.

Adding to 221234375 its reverse (573432122), we get a palindrome (794666497).

The spelling of 221234375 in words is "two hundred twenty-one million, two hundred thirty-four thousand, three hundred seventy-five".