221253135 has 8 divisors (see below), whose sum is σ = 354005040. Its totient is φ = 118001664.

The previous prime is 221253121. The next prime is 221253139. The reversal of 221253135 is 531352122.

It is a happy number.

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

It is not a de Polignac number, because 221253135 - 2⁹ = 221252623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221253139) 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, 7375090 + ... + 7375119.

It is an arithmetic number, because the mean of its divisors is an integer number (44250630).

Almost surely, 2^221253135 is an apocalyptic number.

221253135 is a deficient number, since it is larger than the sum of its proper divisors (132751905).

221253135 is a wasteful number, since it uses less digits than its factorization.

221253135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14750217.

The product of its digits is 1800, while the sum is 24.

The square root of 221253135 is about 14874.5801621424. The cubic root of 221253135 is about 604.8251071093.

The spelling of 221253135 in words is "two hundred twenty-one million, two hundred fifty-three thousand, one hundred thirty-five".