2149753821 has 8 divisors (see below), whose sum is σ = 2927324544. Its totient is φ = 1402676160.

The previous prime is 2149753813. The next prime is 2149753871. The reversal of 2149753821 is 1283579412.

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

It is not a de Polignac number, because 2149753821 - 2³ = 2149753813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149753871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7623100 + ... + 7623381.

It is an arithmetic number, because the mean of its divisors is an integer number (365915568).

Almost surely, 2^2149753821 is an apocalyptic number.

It is an amenable number.

2149753821 is a deficient number, since it is larger than the sum of its proper divisors (777570723).

2149753821 is a wasteful number, since it uses less digits than its factorization.

2149753821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15246531.

The product of its digits is 120960, while the sum is 42.

The square root of 2149753821 is about 46365.4377850571. The cubic root of 2149753821 is about 1290.6136176934.

The spelling of 2149753821 in words is "two billion, one hundred forty-nine million, seven hundred fifty-three thousand, eight hundred twenty-one".