22687157 has 2 divisors, whose sum is σ = 22687158. Its totient is φ = 22687156.

The previous prime is 22687099. The next prime is 22687199. The reversal of 22687157 is 75178622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21446161 + 1240996 = 4631^2 + 1114^2 .

It is a cyclic number.

It is not a de Polignac number, because 22687157 - 2¹² = 22683061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22687157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22687757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11343578 + 11343579.

It is an arithmetic number, because the mean of its divisors is an integer number (11343579).

Almost surely, 2^22687157 is an apocalyptic number.

It is an amenable number.

22687157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22687157 is an equidigital number, since it uses as much as digits as its factorization.

22687157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 38.

The square root of 22687157 is about 4763.1037150161. The cubic root of 22687157 is about 283.0914104105.

The spelling of 22687157 in words is "twenty-two million, six hundred eighty-seven thousand, one hundred fifty-seven".