221053311 has 6 divisors (see below), whose sum is σ = 319299240. Its totient is φ = 147368868.

The previous prime is 221053307. The next prime is 221053321. The reversal of 221053311 is 113350122.

It is not a de Polignac number, because 221053311 - 2² = 221053307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221053321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12280731 + ... + 12280748.

It is an arithmetic number, because the mean of its divisors is an integer number (53216540).

Almost surely, 2^221053311 is an apocalyptic number.

221053311 is a deficient number, since it is larger than the sum of its proper divisors (98245929).

221053311 is a wasteful number, since it uses less digits than its factorization.

221053311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24561485 (or 24561482 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 221053311 is about 14867.8616821653. The cubic root of 221053311 is about 604.6429703683.

The spelling of 221053311 in words is "two hundred twenty-one million, fifty-three thousand, three hundred eleven".