22143149 has 6 divisors (see below), whose sum is σ = 25758414. Its totient is φ = 18979800.

The previous prime is 22143137. The next prime is 22143161. The reversal of 22143149 is 94134122.

22143149 = 426² + 427² + ... + 523².

It is an interprime number because it is at equal distance from previous prime (22143137) and next prime (22143161).

It can be written as a sum of positive squares in only one way, i.e., 19201924 + 2941225 = 4382^2 + 1715^2 .

It is not a de Polignac number, because 22143149 - 2⁴ = 22143133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 225902 + ... + 225999.

It is an arithmetic number, because the mean of its divisors is an integer number (4293069).

Almost surely, 2^22143149 is an apocalyptic number.

It is an amenable number.

22143149 is a deficient number, since it is larger than the sum of its proper divisors (3615265).

22143149 is an equidigital number, since it uses as much as digits as its factorization.

22143149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451915 (or 451908 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 22143149 is about 4705.6507520214. The cubic root of 22143149 is about 280.8103607687.

The spelling of 22143149 in words is "twenty-two million, one hundred forty-three thousand, one hundred forty-nine".