221989495 has 16 divisors (see below), whose sum is σ = 327862080. Its totient is φ = 140511744.

The previous prime is 221989489. The next prime is 221989501. The reversal of 221989495 is 594989122.

It is an interprime number because it is at equal distance from previous prime (221989489) and next prime (221989501).

It is a cyclic number.

It is not a de Polignac number, because 221989495 - 2³ = 221989487 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243490 + ... + 244399.

It is an arithmetic number, because the mean of its divisors is an integer number (20491380).

Almost surely, 2^221989495 is an apocalyptic number.

221989495 is a deficient number, since it is larger than the sum of its proper divisors (105872585).

221989495 is a wasteful number, since it uses less digits than its factorization.

221989495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487914.

The product of its digits is 466560, while the sum is 49.

The square root of 221989495 is about 14899.3118968629. The cubic root of 221989495 is about 605.4953437063.

The spelling of 221989495 in words is "two hundred twenty-one million, nine hundred eighty-nine thousand, four hundred ninety-five".