22251569 has 2 divisors, whose sum is σ = 22251570. Its totient is φ = 22251568.

The previous prime is 22251533. The next prime is 22251599. The reversal of 22251569 is 96515222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12567025 + 9684544 = 3545^2 + 3112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22251569 is a prime.

It is a super-2 number, since 2×22251569² = 990264645923522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22251599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11125784 + 11125785.

It is an arithmetic number, because the mean of its divisors is an integer number (11125785).

Almost surely, 2^22251569 is an apocalyptic number.

It is an amenable number.

22251569 is a deficient number, since it is larger than the sum of its proper divisors (1).

22251569 is an equidigital number, since it uses as much as digits as its factorization.

22251569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 22251569 is about 4717.1568767638. The cubic root of 22251569 is about 281.2679274828.

The spelling of 22251569 in words is "twenty-two million, two hundred fifty-one thousand, five hundred sixty-nine".