222147309 has 4 divisors (see below), whose sum is σ = 296196416. Its totient is φ = 148098204.

The previous prime is 222147287. The next prime is 222147319. The reversal of 222147309 is 903741222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 222147309 - 2⁷ = 222147181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222147319) 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, 37024549 + ... + 37024554.

It is an arithmetic number, because the mean of its divisors is an integer number (74049104).

Almost surely, 2^222147309 is an apocalyptic number.

It is an amenable number.

222147309 is a deficient number, since it is larger than the sum of its proper divisors (74049107).

222147309 is an equidigital number, since it uses as much as digits as its factorization.

222147309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74049106.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 222147309 is about 14904.6069723425. The cubic root of 222147309 is about 605.6387934483.

The spelling of 222147309 in words is "two hundred twenty-two million, one hundred forty-seven thousand, three hundred nine".