22742149 has 2 divisors, whose sum is σ = 22742150. Its totient is φ = 22742148.

The previous prime is 22742131. The next prime is 22742191. The reversal of 22742149 is 94124722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17791524 + 4950625 = 4218^2 + 2225^2 .

It is a cyclic number.

It is not a de Polignac number, because 22742149 - 2⁵ = 22742117 is a prime.

It is a super-2 number, since 2×22742149² = 1034410682276402, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22742149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22740149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11371074 + 11371075.

It is an arithmetic number, because the mean of its divisors is an integer number (11371075).

Almost surely, 2^22742149 is an apocalyptic number.

It is an amenable number.

22742149 is a deficient number, since it is larger than the sum of its proper divisors (1).

22742149 is an equidigital number, since it uses as much as digits as its factorization.

22742149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 22742149 is about 4768.8729276423. The cubic root of 22742149 is about 283.3199567695.

The spelling of 22742149 in words is "twenty-two million, seven hundred forty-two thousand, one hundred forty-nine".