2149428081 has 8 divisors (see below), whose sum is σ = 2869398144. Its totient is φ = 1431205040.

The previous prime is 2149428049. The next prime is 2149428089. The reversal of 2149428081 is 1808249412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2149428081 - 2⁵ = 2149428049 is a prime.

It is a super-2 number, since 2×2149428081² = 9240082150782685122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2149428089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433881 + ... + 438806.

It is an arithmetic number, because the mean of its divisors is an integer number (358674768).

Almost surely, 2^2149428081 is an apocalyptic number.

It is an amenable number.

2149428081 is a deficient number, since it is larger than the sum of its proper divisors (719970063).

2149428081 is an equidigital number, since it uses as much as digits as its factorization.

2149428081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873511.

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 2149428081 is about 46361.9249061123. The cubic root of 2149428081 is about 1290.5484279476.

The spelling of 2149428081 in words is "two billion, one hundred forty-nine million, four hundred twenty-eight thousand, eighty-one".