22702181 has 2 divisors, whose sum is σ = 22702182. Its totient is φ = 22702180.

The previous prime is 22702153. The next prime is 22702189. The reversal of 22702181 is 18120722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14945956 + 7756225 = 3866^2 + 2785^2 .

It is a cyclic number.

It is not a de Polignac number, because 22702181 - 2⁶ = 22702117 is a prime.

It is a super-2 number, since 2×22702181² = 1030778044313522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22702189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11351090 + 11351091.

It is an arithmetic number, because the mean of its divisors is an integer number (11351091).

Almost surely, 2^22702181 is an apocalyptic number.

It is an amenable number.

22702181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22702181 is an equidigital number, since it uses as much as digits as its factorization.

22702181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 22702181 is about 4764.6805769117. The cubic root of 22702181 is about 283.1538866806.

The spelling of 22702181 in words is "twenty-two million, seven hundred two thousand, one hundred eighty-one".