221958914 has 4 divisors (see below), whose sum is σ = 332938374. Its totient is φ = 110979456.

The previous prime is 221958911. The next prime is 221958917. The reversal of 221958914 is 419859122.

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

It is an interprime number because it is at equal distance from previous prime (221958911) and next prime (221958917).

It can be written as a sum of positive squares in only one way, i.e., 221027689 + 931225 = 14867^2 + 965^2 .

It is not an unprimeable number, because it can be changed into a prime (221958911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55489727 + ... + 55489730.

Almost surely, 2^221958914 is an apocalyptic number.

221958914 is a deficient number, since it is larger than the sum of its proper divisors (110979460).

221958914 is a wasteful number, since it uses less digits than its factorization.

221958914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110979459.

The product of its digits is 51840, while the sum is 41.

The square root of 221958914 is about 14898.2856060689. The cubic root of 221958914 is about 605.4675383313.

The spelling of 221958914 in words is "two hundred twenty-one million, nine hundred fifty-eight thousand, nine hundred fourteen".