221949627 has 12 divisors (see below), whose sum is σ = 300433896. Its totient is φ = 145749120.

The previous prime is 221949587. The next prime is 221949661. The reversal of 221949627 is 726949122.

It is not a de Polignac number, because 221949627 - 2¹² = 221945531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221949667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5227 + ... + 21707.

It is an arithmetic number, because the mean of its divisors is an integer number (25036158).

Almost surely, 2^221949627 is an apocalyptic number.

221949627 is a deficient number, since it is larger than the sum of its proper divisors (78484269).

221949627 is an equidigital number, since it uses as much as digits as its factorization.

221949627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16618 (or 16551 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 221949627 is about 14897.9739226514. The cubic root of 221949627 is about 605.4590937422.

The spelling of 221949627 in words is "two hundred twenty-one million, nine hundred forty-nine thousand, six hundred twenty-seven".