1002222251 has 4 divisors (see below), whose sum is σ = 1002307992. Its totient is φ = 1002136512.

The previous prime is 1002222229. The next prime is 1002222257. The reversal of 1002222251 is 1522222001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1522222001 = 3083 ⋅493747.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002222251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002222257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21926 + ... + 49851.

It is an arithmetic number, because the mean of its divisors is an integer number (250576998).

Almost surely, 2^1002222251 is an apocalyptic number.

1002222251 is a deficient number, since it is larger than the sum of its proper divisors (85741).

1002222251 is an equidigital number, since it uses as much as digits as its factorization.

1002222251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85740.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1002222251 is about 31657.8939760686. The cubic root of 1002222251 is about 1000.7402022987.

Adding to 1002222251 its reverse (1522222001), we get a palindrome (2524444252).

The spelling of 1002222251 in words is "one billion, two million, two hundred twenty-two thousand, two hundred fifty-one".