221253099 has 16 divisors (see below), whose sum is σ = 297364608. Its totient is φ = 146327552.

The previous prime is 221253089. The next prime is 221253121. The reversal of 221253099 is 990352122.

221253099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221253099 - 2⁷ = 221252971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221253029) 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, 267124 + ... + 267950.

It is an arithmetic number, because the mean of its divisors is an integer number (18585288).

Almost surely, 2^221253099 is an apocalyptic number.

221253099 is a deficient number, since it is larger than the sum of its proper divisors (76111509).

221253099 is a wasteful number, since it uses less digits than its factorization.

221253099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 221253099 is about 14874.5789520242. The cubic root of 221253099 is about 604.8250743056.

The spelling of 221253099 in words is "two hundred twenty-one million, two hundred fifty-three thousand, ninety-nine".