22100251 has 2 divisors, whose sum is σ = 22100252. Its totient is φ = 22100250.

The previous prime is 22100227. The next prime is 22100261. The reversal of 22100251 is 15200122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22100251 - 2⁵ = 22100219 is a prime.

It is not a weakly prime, because it can be changed into another prime (22100261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050125 + 11050126.

It is an arithmetic number, because the mean of its divisors is an integer number (11050126).

Almost surely, 2^22100251 is an apocalyptic number.

22100251 is a deficient number, since it is larger than the sum of its proper divisors (1).

22100251 is an equidigital number, since it uses as much as digits as its factorization.

22100251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 22100251 is about 4701.0904054272. The cubic root of 22100251 is about 280.6289052421.

Adding to 22100251 its reverse (15200122), we get a palindrome (37300373).

The spelling of 22100251 in words is "twenty-two million, one hundred thousand, two hundred fifty-one".