22971149 has 2 divisors, whose sum is σ = 22971150. Its totient is φ = 22971148.

The previous prime is 22971121. The next prime is 22971173. The reversal of 22971149 is 94117922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17598025 + 5373124 = 4195^2 + 2318^2 .

It is a cyclic number.

It is not a de Polignac number, because 22971149 - 2¹² = 22967053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22971049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11485574 + 11485575.

It is an arithmetic number, because the mean of its divisors is an integer number (11485575).

Almost surely, 2^22971149 is an apocalyptic number.

It is an amenable number.

22971149 is a deficient number, since it is larger than the sum of its proper divisors (1).

22971149 is an equidigital number, since it uses as much as digits as its factorization.

22971149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 22971149 is about 4792.8226547620. The cubic root of 22971149 is about 284.2677374966.

It can be divided in two parts, 2297 and 1149, that multiplied together give a triangular number (2639253 = T₂₂₉₇).

The spelling of 22971149 in words is "twenty-two million, nine hundred seventy-one thousand, one hundred forty-nine".