221151356 has 24 divisors (see below), whose sum is σ = 396809280. Its totient is φ = 107796032.

The previous prime is 221151353. The next prime is 221151379. The reversal of 221151356 is 653151122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221151353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48386 + ... + 52758.

It is an arithmetic number, because the mean of its divisors is an integer number (16533720).

Almost surely, 2^221151356 is an apocalyptic number.

It is an amenable number.

221151356 is a deficient number, since it is larger than the sum of its proper divisors (175657924).

221151356 is a wasteful number, since it uses less digits than its factorization.

221151356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4693 (or 4691 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 221151356 is about 14871.1585291799. The cubic root of 221151356 is about 604.7323507042.

The spelling of 221151356 in words is "two hundred twenty-one million, one hundred fifty-one thousand, three hundred fifty-six".