221949199 has 4 divisors (see below), whose sum is σ = 227947864. Its totient is φ = 215950536.

The previous prime is 221949197. The next prime is 221949227. The reversal of 221949199 is 991949122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221949199 - 2¹ = 221949197 is a prime.

It is a super-2 number, since 2×221949199² = 98522893873483202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221949197) 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, 2999277 + ... + 2999350.

It is an arithmetic number, because the mean of its divisors is an integer number (56986966).

Almost surely, 2^221949199 is an apocalyptic number.

221949199 is a deficient number, since it is larger than the sum of its proper divisors (5998665).

221949199 is an equidigital number, since it uses as much as digits as its factorization.

221949199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5998664.

The product of its digits is 104976, while the sum is 46.

The square root of 221949199 is about 14897.9595582751. The cubic root of 221949199 is about 605.4587045599.

The spelling of 221949199 in words is "two hundred twenty-one million, nine hundred forty-nine thousand, one hundred ninety-nine".