2221023251 has 2 divisors, whose sum is σ = 2221023252. Its totient is φ = 2221023250.

The previous prime is 2221023227. The next prime is 2221023263. The reversal of 2221023251 is 1523201222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221023251 - 2⁶ = 2221023187 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221023271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110511625 + 1110511626.

It is an arithmetic number, because the mean of its divisors is an integer number (1110511626).

Almost surely, 2^2221023251 is an apocalyptic number.

2221023251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221023251 is an equidigital number, since it uses as much as digits as its factorization.

2221023251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2221023251 is about 47127.7333530905. The cubic root of 2221023251 is about 1304.7211474868.

Adding to 2221023251 its reverse (1523201222), we get a palindrome (3744224473).

It can be divided in two parts, 222 and 1023251, that multiplied together give a palindrome (227161722).

The spelling of 2221023251 in words is "two billion, two hundred twenty-one million, twenty-three thousand, two hundred fifty-one".