221595146 has 16 divisors (see below), whose sum is σ = 343997280. Its totient is φ = 106975440.

The previous prime is 221595113. The next prime is 221595151. The reversal of 221595146 is 641595122.

It is a happy number.

It is a super-2 number, since 2×221595146² = 98208817461522632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1736 + ... + 21123.

It is an arithmetic number, because the mean of its divisors is an integer number (21499830).

Almost surely, 2^221595146 is an apocalyptic number.

221595146 is a deficient number, since it is larger than the sum of its proper divisors (122402134).

221595146 is a wasteful number, since it uses less digits than its factorization.

221595146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23029.

The product of its digits is 21600, while the sum is 35.

The square root of 221595146 is about 14886.0722153293. The cubic root of 221595146 is about 605.1365909750.

The spelling of 221595146 in words is "two hundred twenty-one million, five hundred ninety-five thousand, one hundred forty-six".