221275375 has 16 divisors (see below), whose sum is σ = 278280288. Its totient is φ = 175656000.

The previous prime is 221275367. The next prime is 221275393. The reversal of 221275375 is 573572122.

It is not a de Polignac number, because 221275375 - 2³ = 221275367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221275375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9619 + ... + 23131.

It is an arithmetic number, because the mean of its divisors is an integer number (17392518).

Almost surely, 2^221275375 is an apocalyptic number.

221275375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

221275375 is a deficient number, since it is larger than the sum of its proper divisors (57004913).

221275375 is a wasteful number, since it uses less digits than its factorization.

221275375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13659 (or 13649 counting only the distinct ones).

The product of its digits is 29400, while the sum is 34.

The square root of 221275375 is about 14875.3277274822. The cubic root of 221275375 is about 604.8453717708.

The spelling of 221275375 in words is "two hundred twenty-one million, two hundred seventy-five thousand, three hundred seventy-five".