22071157 has 2 divisors, whose sum is σ = 22071158. Its totient is φ = 22071156.

The previous prime is 22071121. The next prime is 22071173. The reversal of 22071157 is 75117022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20711601 + 1359556 = 4551^2 + 1166^2 .

It is a cyclic number.

It is not a de Polignac number, because 22071157 - 2⁷ = 22071029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22071187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11035578 + 11035579.

It is an arithmetic number, because the mean of its divisors is an integer number (11035579).

Almost surely, 2^22071157 is an apocalyptic number.

It is an amenable number.

22071157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22071157 is an equidigital number, since it uses as much as digits as its factorization.

22071157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 22071157 is about 4697.9949978688. The cubic root of 22071157 is about 280.5057059961.

Adding to 22071157 its reverse (75117022), we get a palindrome (97188179).

It can be divided in two parts, 2207 and 1157, that added together give a square (3364 = 58²).

The spelling of 22071157 in words is "twenty-two million, seventy-one thousand, one hundred fifty-seven".