22155361 has 2 divisors, whose sum is σ = 22155362. Its totient is φ = 22155360.

The previous prime is 22155317. The next prime is 22155373. The reversal of 22155361 is 16355122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16000000 + 6155361 = 4000^2 + 2481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22155361 is a prime.

It is equal to p_1398400 and since 22155361 and 1398400 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (22150361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077680 + 11077681.

It is an arithmetic number, because the mean of its divisors is an integer number (11077681).

Almost surely, 2^22155361 is an apocalyptic number.

It is an amenable number.

22155361 is a deficient number, since it is larger than the sum of its proper divisors (1).

22155361 is an equidigital number, since it uses as much as digits as its factorization.

22155361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 22155361 is about 4706.9481620260. The cubic root of 22155361 is about 280.8619738117.

The spelling of 22155361 in words is "twenty-two million, one hundred fifty-five thousand, three hundred sixty-one".