22249951 has 2 divisors, whose sum is σ = 22249952. Its totient is φ = 22249950.

The previous prime is 22249949. The next prime is 22249961. The reversal of 22249951 is 15994222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22249951 - 2¹ = 22249949 is a prime.

Together with 22249949, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22249961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11124975 + 11124976.

It is an arithmetic number, because the mean of its divisors is an integer number (11124976).

Almost surely, 2^22249951 is an apocalyptic number.

22249951 is the 2110-th centered decagonal number.

22249951 is a deficient number, since it is larger than the sum of its proper divisors (1).

22249951 is an equidigital number, since it uses as much as digits as its factorization.

22249951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 22249951 is about 4716.9853720358. The cubic root of 22249951 is about 281.2611099480.

The spelling of 22249951 in words is "twenty-two million, two hundred forty-nine thousand, nine hundred fifty-one".