242228391 has 16 divisors (see below), whose sum is σ = 329710176. Its totient is φ = 158128256.

The previous prime is 242228351. The next prime is 242228449. The reversal of 242228391 is 193822242.

242228391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 242228391 - 2⁷ = 242228263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242228351) 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, 102661 + ... + 104993.

It is an arithmetic number, because the mean of its divisors is an integer number (20606886).

Almost surely, 2^242228391 is an apocalyptic number.

242228391 is a deficient number, since it is larger than the sum of its proper divisors (87481785).

242228391 is a wasteful number, since it uses less digits than its factorization.

242228391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042.

The product of its digits is 13824, while the sum is 33.

The square root of 242228391 is about 15563.6882196991. The cubic root of 242228391 is about 623.3639480580.

The spelling of 242228391 in words is "two hundred forty-two million, two hundred twenty-eight thousand, three hundred ninety-one".