22155829 has 2 divisors, whose sum is σ = 22155830. Its totient is φ = 22155828.

The previous prime is 22155823. The next prime is 22155839. The reversal of 22155829 is 92855122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14455204 + 7700625 = 3802^2 + 2775^2 .

It is a cyclic number.

It is not a de Polignac number, because 22155829 - 2⁷ = 22155701 is a prime.

It is equal to p_1398427 and since 22155829 and 1398427 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 22155794 and 22155803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22155823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077914 + 11077915.

It is an arithmetic number, because the mean of its divisors is an integer number (11077915).

Almost surely, 2^22155829 is an apocalyptic number.

It is an amenable number.

22155829 is a deficient number, since it is larger than the sum of its proper divisors (1).

22155829 is an equidigital number, since it uses as much as digits as its factorization.

22155829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 34.

The square root of 22155829 is about 4706.9978755041. The cubic root of 22155829 is about 280.8639513990.

The spelling of 22155829 in words is "twenty-two million, one hundred fifty-five thousand, eight hundred twenty-nine".