221053505 has 16 divisors (see below), whose sum is σ = 279789120. Its totient is φ = 167197248.

The previous prime is 221053501. The next prime is 221053519. The reversal of 221053505 is 505350122.

It is a cyclic number.

It is not a de Polignac number, because 221053505 - 2² = 221053501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221053501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51419 + ... + 55551.

It is an arithmetic number, because the mean of its divisors is an integer number (17486820).

Almost surely, 2^221053505 is an apocalyptic number.

It is an amenable number.

221053505 is a deficient number, since it is larger than the sum of its proper divisors (58735615).

221053505 is a wasteful number, since it uses less digits than its factorization.

221053505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4720.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 221053505 is about 14867.8682063031. The cubic root of 221053505 is about 604.6431472498.

The spelling of 221053505 in words is "two hundred twenty-one million, fifty-three thousand, five hundred five".