221282270 has 16 divisors (see below), whose sum is σ = 434518128. Its totient is φ = 80466240.

The previous prime is 221282249. The next prime is 221282279. The reversal of 221282270 is 72282122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221282279) 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, 1005719 + ... + 1005938.

It is an arithmetic number, because the mean of its divisors is an integer number (27157383).

Almost surely, 2^221282270 is an apocalyptic number.

221282270 is a deficient number, since it is larger than the sum of its proper divisors (213235858).

221282270 is a wasteful number, since it uses less digits than its factorization.

221282270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011675.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 221282270 is about 14875.5594852765. The cubic root of 221282270 is about 604.8516540869.

The spelling of 221282270 in words is "two hundred twenty-one million, two hundred eighty-two thousand, two hundred seventy".