2149331549 has 6 divisors (see below), whose sum is σ = 2223704730. Its totient is φ = 2074975616.

The previous prime is 2149331521. The next prime is 2149331551. The reversal of 2149331549 is 9451339412.

It can be written as a sum of positive squares in 3 ways, for example, as 34987225 + 2114344324 = 5915^2 + 45982^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2149331549 is a prime.

It is a super-2 number, since 2×2149331549² = 9239252215053478802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149331519) 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, 245357 + ... + 253965.

It is an arithmetic number, because the mean of its divisors is an integer number (370617455).

Almost surely, 2^2149331549 is an apocalyptic number.

2149331549 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2149331549 is a deficient number, since it is larger than the sum of its proper divisors (74373181).

2149331549 is an frugal number, since it uses more digits than its factorization.

2149331549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17247 (or 8638 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 2149331549 is about 46360.8838246209. The cubic root of 2149331549 is about 1290.5291079112.

The spelling of 2149331549 in words is "two billion, one hundred forty-nine million, three hundred thirty-one thousand, five hundred forty-nine".