221006051 has 8 divisors (see below), whose sum is σ = 253044480. Its totient is φ = 189084168.

The previous prime is 221006041. The next prime is 221006059. The reversal of 221006051 is 150600122.

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

It is not a de Polignac number, because 221006051 - 2²² = 216811747 is a prime.

It is a super-2 number, since 2×221006051² = 97687349157229202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221006059) 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 in 7 ways as a sum of consecutive naturals, for example, 25031 + ... + 32688.

It is an arithmetic number, because the mean of its divisors is an integer number (31630560).

Almost surely, 2^221006051 is an apocalyptic number.

221006051 is a deficient number, since it is larger than the sum of its proper divisors (32038429).

221006051 is an equidigital number, since it uses as much as digits as its factorization.

221006051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58273.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 221006051 is about 14866.2722630793. The cubic root of 221006051 is about 604.5998775003.

Adding to 221006051 its reverse (150600122), we get a palindrome (371606173).

It can be divided in two parts, 22 and 1006051, that multiplied together give a palindrome (22133122).

The spelling of 221006051 in words is "two hundred twenty-one million, six thousand, fifty-one".