221535452 has 12 divisors (see below), whose sum is σ = 388434816. Its totient is φ = 110554080.

The previous prime is 221535451. The next prime is 221535473. The reversal of 221535452 is 254535122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221535451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51068 + ... + 55235.

It is an arithmetic number, because the mean of its divisors is an integer number (32369568).

Almost surely, 2^221535452 is an apocalyptic number.

It is an amenable number.

221535452 is a deficient number, since it is larger than the sum of its proper divisors (166899364).

221535452 is a wasteful number, since it uses less digits than its factorization.

221535452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106828 (or 106826 counting only the distinct ones).

The product of its digits is 12000, while the sum is 29.

The square root of 221535452 is about 14884.0670517167. The cubic root of 221535452 is about 605.0822482266.

The spelling of 221535452 in words is "two hundred twenty-one million, five hundred thirty-five thousand, four hundred fifty-two".