22012157 has 2 divisors, whose sum is σ = 22012158. Its totient is φ = 22012156.

The previous prime is 22012141. The next prime is 22012171. The reversal of 22012157 is 75121022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11115556 + 10896601 = 3334^2 + 3301^2 .

It is a cyclic number.

It is not a de Polignac number, because 22012157 - 2⁴ = 22012141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22012117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006078 + 11006079.

It is an arithmetic number, because the mean of its divisors is an integer number (11006079).

Almost surely, 2^22012157 is an apocalyptic number.

It is an amenable number.

22012157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22012157 is an equidigital number, since it uses as much as digits as its factorization.

22012157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 22012157 is about 4691.7115213960. The cubic root of 22012157 is about 280.2555362769.

Adding to 22012157 its reverse (75121022), we get a palindrome (97133179).

The spelling of 22012157 in words is "twenty-two million, twelve thousand, one hundred fifty-seven".