221991962 has 8 divisors (see below), whose sum is σ = 333333792. Its totient is φ = 110880700.

The previous prime is 221991947. The next prime is 221991977. The reversal of 221991962 is 269199122.

It is a happy number.

221991962 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221991947) and next prime (221991977).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55214 + ... + 59097.

It is an arithmetic number, because the mean of its divisors is an integer number (41666724).

Almost surely, 2^221991962 is an apocalyptic number.

221991962 is a deficient number, since it is larger than the sum of its proper divisors (111341830).

221991962 is a wasteful number, since it uses less digits than its factorization.

221991962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115284.

The product of its digits is 34992, while the sum is 41.

The square root of 221991962 is about 14899.3946856911. The cubic root of 221991962 is about 605.4975866825.

The spelling of 221991962 in words is "two hundred twenty-one million, nine hundred ninety-one thousand, nine hundred sixty-two".